Question: Esad T. Ribić, is a Croatian comic book artist, known for his work on various titles for which organization, including "Loki", a fictional character appearing in American comic books?
Context: Dream is a fictional character appearing in American comic books published by DC Comics' imprint Vertigo.  The character is the protagonist of the comic book series "The Sandman", written by Neil Gaiman.  One of the seven Endless, inconceivably powerful beings older and greater than gods, Dream is both lord and personification of all dreams and stories, all that is not in reality (which, in turn, Dream may define by his existence).  He has taken many names, including Morpheus and Oneiros, and his appearance can change depending on the person who is seeing him.  Dream was named the sixth-greatest comic book character by "Empire Magazine".  He was also named fifteenth in IGN's 100 Top Comic Book Heroes list. The Man-Thing (Dr. Theodore "Ted" Sallis) is a fictional character appearing in American comic books published by Marvel Comics.  Created by writers Stan Lee, Roy Thomas, and Gerry Conway and artist Gray Morrow, the character first appeared in "Savage Tales" #1 (May 1971), and went on to be featured in various titles and in his own series, including "Adventure into Fear", which introduced the character Howard the Duck. Lucas "Snapper" Carr is a fictional character appearing in American comic books published by DC Comics.  The character, whose fictional nickname is almost always used by other characters in favor of his given name, was created by Gardner Fox (writer) and Mike Sekowsky (penciller), and made his first appearance in "The Brave and the Bold" in February 1960.  From 1960 to 1969, Snapper Carr appeared as a supporting character to the Justice League of America, a superhero team.  The character occasionally appeared in comics featuring the Justice League from 1969 to 1989, when the "Invasion! " limited-series comic book gave him superpowers.  He was associated with a new superhero team, The Blasters, in various comics until 1993, when he lost his powers and became a main character in the "Hourman" comic book.  After the cancellation of "Hourman" in April 2001, he became a main character in the "Young Justice" comic book beginning in December 2001.  "Young Justice" was cancelled in May 2003, and he became associated with the governmental organization Checkmate, a role revealed when the character played a small but important role in the 2007-2008 limited series comic book "52 Aftermath: The Four Horsemen".  The character made major appearances in "Final Crisis: Resist" in December 2008 and "Justice League of America 80-Page Giant" in November 2009. Ka-Zar (pronunciation: "KAY-sar") is the name of two jungle-dwelling fictional comic book characters published in the United States.  The first Ka-Zar was named David Rand, and debuted in 1936, first appearing in pulp magazines of the 1930s.  In 1939 he was adapted for his second iteration, a comic book character for Timely Comics, the 1930s and 1940s predecessor of Marvel Comics.  The second and more prominent Ka-Zar was named Kevin Plunder, and first appeared in 1965.  He is a heroic character appearing in American comic books published by Marvel Comics. Hagibis (meaning "rapidity", "velocity", or "speed" in Tagalog) is one of the first comic book heroes in the history of komiks in the Philippines.  Hagibis was created in 1947 by Francisco V. Coching, a Filipino comic book artist and illustrator who is considered as the “father" or "grandfather” of Filipino komiks.  Tarzan-like in appearance, the form of Hagibis had also been based on another early Filipino comic book hero, namely Kulafu who was created by another pioneer Filipino comic book artist, Francisco Reyes.  Hagibis became one of the longest running serials in the history of Filipino comic books, which was featured for fifteen years in the pages of "Liwayway" magazine.  An example story about Hagibis that appeared in "Liwayway" magazine was "Si Hagibis sa Ibang Daigdig" (Hagibis in Another World).  Sequels in komiks to the Hagibis series were "Anak ni Hagibis" (Child of Hagibis) and "Si Gat Sibasib" (Gat Sibasib).  Hagibis was later made into a movie with Fernando Poe, Sr. acting as Hagibis. Esad T. Ribić (born 10 November 1972) is a Croatian comic book artist, known for his work on various titles for Marvel Comics, including "Loki", "Silver Surfer: Requiem", "Sub-Mariner: The Depths" and the 2015 "Secret Wars". Killeroo is a fictional character appearing in Australian comic book "Captain Koala".  All of the characters in the series were created by James Clifton.  Killeroo started as a Level 2 agent in Captain Koala #1, by issue #10 gets promoted to Level 1.  He is now appearing in solo titles such as Killeroo: Gang Wars by artist Tim Stiles Professional comic book artist Darren Close has created many comics featuring Killeroo.  Killeroo also appeared in Gold Age comics A comics artist (also comic book artist or graphic novel artist, comic book producer, comic book illustrator, comic book writer, and comic book author) is a person working within the comics medium on comic strips, comic books, or graphic novels.  The term may refer to any number of artists who contribute to produce a work in the comics form, from those who oversee all aspects of the work to those who contribute only a part. Loki is a fictional character appearing in American comic books published by Marvel Comics.  He is the adoptive brother and often the enemy of Thor.  He is based on the being of the same name from Norse mythology.  The character first appeared historically in "Venus" No. 6 (August 1949) and in modern-day in "Journey into Mystery" No. 85 (October 1962).  The character was created by writer Stan Lee, scripter Larry Lieber, and penciller Jack Kirby.  Though normally portrayed as a supervillain, he is sometimes depicted as an antihero. Namor the Sub-Mariner ( ) (Namor McKenzie) is a fictional character appearing in American comic books published by Marvel Comics.  Debuting in early 1939, the character was created by writer-artist Bill Everett for Funnies Inc., one of the first "packagers" in the early days of comic books that supplied comics on demand to publishers looking to enter the new medium.  Initially created for the unreleased comic "Motion Picture Funnies Weekly", the Sub-Mariner first appeared publicly in "Marvel Comics" #1 (cover-dated Oct. 1939) – the first comic book from Timely Comics, the 1930s–1940s predecessor of the company Marvel Comics.  During that period, known to historians and fans as the Golden Age of Comic Books, the Sub-Mariner was one of Timely's top three characters, along with Captain America and the original Human Torch.  Everett said the character's name was inspired by Samuel Taylor Coleridge's poem, "The Rime of the Ancient Mariner".  Everett came up with "Namor" by writing down noble sounding names backwards and thought Roman/Namor looked the best.
Answer: Marvel Comics