Question: What writer-artist created the character who is trying to amass Infinity Stones in Avengers: Infinity War?

Context articles: Production of Avengers: Infinity War and the untitled Avengers sequel
The Infinity War
Thanos
Infinity (comics)
Infinity Online
Mister Bones
Avengers: Infinity War
Marvel vs. Capcom: Infinite
Infinity Gems
Hourman (Rick Tyler)

Production of Avengers: Infinity War and the untitled Avengers sequel
The Infinity War is a six-issue comic book limited series published by Marvel Comics in 1992.
 The series was written by Jim Starlin and penciled by Ron Lim, Ian Laughlin, Al Milgrom, Jack Morelli and Christie Scheele.
Thanos ( , ) is a fictional supervillain appearing in American comic books published by Marvel Comics.
 Created by writer Mike Friedrich and writer-artist Jim Starlin, the character first appeared in "Iron Man" #55 (cover dated Feb. 1973).
Infinity is a fictional character appearing in American comic books published by Marvel Comics.
 Infinity first appears in Quasar #24 (July 1991).
 The character was created by Mark Gruenwald and Greg Capullo.
Infinity Online is a free action MMOG created by the Korean software company Windysoft.
 It was supposed to be released on October 12, 2006, but due to an IDC problem, was released internationally on October 17.
 Gameplay is similar in style to Rakion with separate game rooms for players to enter, and players have the option of using a mouse and keyboard or a controller to control their character.
 There are both player versus player and mission modes where players cooperate to defeat AI enemies.
 The in-game currency is the luna.
 Game Tribe is currently working on the Europe version of Infinity Online.
Mister Bones is a fictional character in the DC Comics Universe , created by Roy Thomas, Dann Thomas, and Todd McFarlane, in "Infinity, Inc." #16 (July 1985).
 A former low-level supervillain, he reformed and joined the Infinity Inc. team, then later the (fictional) Department of Extranormal Operations (a government agency which regulates superhero activity) as a bureaucrat, eventually rising to the rank of Regional Director for the Eastern Seaboard.
 Thus, he now wears a suit and tie instead of a costume, and is also known as Director Bones.
 A chain-smoker, he had a habit of speaking in rhyme in early appearances; however, he no longer does so.
Avengers: Infinity War is an upcoming American superhero film based on the Marvel Comics superhero team the Avengers, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures.
 It is intended to be the sequel to 2012's "Marvel's The Avengers" and 2015's "" and the nineteenth film installment in the Marvel Cinematic Universe (MCU).
 The film is directed by Anthony and Joe Russo, with a screenplay by Christopher Markus & Stephen McFeely, and features an ensemble cast that includes Robert Downey Jr., Josh Brolin, Mark Ruffalo, Tom Hiddleston, Chris Evans, Chris Hemsworth, Jeremy Renner, Chris Pratt, Elizabeth Olsen, Sebastian Stan, Benedict Cumberbatch, Paul Bettany, Cobie Smulders, Benedict Wong, Zoe Saldana, Karen Gillan, Vin Diesel, Dave Bautista, Bradley Cooper, Pom Klementieff, Scarlett Johansson, Benicio del Toro, Tom Holland, Anthony Mackie, Chadwick Boseman, Danai Gurira, Paul Rudd, and Don Cheadle.
 In "Avengers: Infinity War", the Avengers join forces with the Guardians of the Galaxy to confront Thanos, who is trying to amass the Infinity Stones.
Marvel vs. Capcom: Infinite is a fighting video game developed and published by Capcom.
 It is the sixth main entry in the "Marvel vs. Capcom" series of crossover games.
 Like previous installments, players control characters from both the Marvel Comics and Capcom universes to compete in tag team battles.
 "Infinite" features two-on-two fights, as opposed to the three-on-three format used in its preceding titles.
 The series' traditional character assists have been removed; instead, the game incorporates a tag-based combo system, which allows players to instantly switch between their two characters to form continuous combos.
 It also introduces a new gameplay mechanic in the form of the Infinity Stones, which temporarily bestow players with unique abilities and stat boosts depending on the type of stone selected.
The Infinity Gems, originally referred to as Soul Gems, are six immensely powerful fictional gems appearing in American comic books published by Marvel Comics.
 Whoever holds all six gems and uses them in concert, such as in the Infinity Gauntlet, gains virtual omnipotence and omniscience.
 The six primary gems are the Mind Gem, the Soul Gem, the Space Gem, the Power Gem, the Time Gem and the Reality Gem, and in later storylines, crossovers and other media, a seventh Infinity Gem is sometimes added.
 The Gems play a prominent role in the first three phases of the Marvel Cinematic Universe, where they are known as the Infinity Stones.
Hourman (Rick Tyler) is a fictional character, a superhero who was created by Roy Thomas, Dann Thomas and first appeared in "Infinity Inc." #20 as Rick Tyler, son of the original Hourman, who quickly joined Infinity Inc. as the second Hourman in #21 of that book.