Question: Lorentz & Sakarias was a group that has collaborated with the actor best known for which role in the series "Vikings"?

Context paragraphs:
Gage Clarke: Gage Clarke (March 3, 1900 – October 22, 1964) was an American character actor best known for his role as the principal in "Mister Peepers".  His other work consisted largely of one-shot appearances in television series such as seven major supporting roles as different characters in "Maverick", twelve roles in "Gunsmoke" (Clarke played a key role in the "Maverick" spoof of "Gunsmoke", an episode entitled "Gun-Shy"), "Mister Ed", "Laramie", "Ben Casey", "Checkmate", "The Twilight Zone", "The Real McCoys" (twice), four roles in "Alfred Hitchcock Presents", "Bourbon Street Beat", "Thriller", "Have Gun Will Travel", and many others, as well as movies including "I Want to Live! ", "The Bad Seed", "The Brothers Karamazov", and "The Absent-Minded Professor".  Clarke, a slightly overweight actor with a double chin, specialized in playing avuncular, rather timid characters, with one of his largest parts being frightened gambler "Foursquare Farley" in the "Maverick" episode "Greenbacks, Unlimited" opposite James Garner and John Dehner.  He made two guest appearances on "Perry Mason", including the role of Frederick Rollins in "The Case of the Glittering Goldfish" in 1959.  He also played the part of Mr. Murg in "Pollyanna" in 1960.

Flea (musician): Michael Peter Balzary (born 16 October 1962), better known by his stage name Flea, is an Australian-American musician and actor best known as bassist and founding member of the rock band Red Hot Chili Peppers.  Flea briefly appeared as the bassist for such bands as What Is This? , Fear and Jane's Addiction.  He has also performed with rock supergroups Atoms for Peace, Antemasque, Pigface, and Rocket Juice & the Moon.  Flea has also collaborated with artists including The Mars Volta, Johnny Cash, Tom Waits, Alanis Morissette, and Young MC.

Joshua Gomez: Joshua Eli Gomez (born November 20, 1975) is an American actor best known for his role as Morgan Grimes on "Chuck".  He is the younger brother of actor Rick Gomez.  Gomez appeared in a recurring role in the CBS series "Without a Trace" as computer tech James Mackeroy.  He appeared in a series of IBM commercials, a series of Wendy's commercials (Ranch Tooth), and a commercial for Garmin.  He also made a cameo on "Freddy's Nightmares".  He played Sammy Stinger in "Bring It On Again", 2004.

Michael Ande: Michael Ande (born 5 October 1944, Bad Wiessee) is a German actor best known for his role as Gerd Heymann in the West German crime-drama television series "Der Alte".  He was a well-known German film child star during the 1950s.  A German reader reports, "Michael played in mostly melodramas--those films with nice people, love and mountains, etc (sentimental film in an idealized setting).  Some would consider these rather schmaltz tear-jerkers.  Two words come to mind in German.  The first is "Heimatfilm".  Heimat is home, where I came from This kind of film stands for: very sentimental, lots of love (and some ache but with Happy End), idealistic setting, Lederhosen, Mountains, Conservative ideals, etc.  The second is "Heile-Welt-Film" meaning "intact-world-film" They were, however very popular films in Germany."  He played a variety of roles in these films, including choir boys.  One of these films was "Der schoenste Tag in meinem Leben" (1957) in which he played a chorister in the Vienna Boys' Choir.  There is an image of him, for example, on the HBC choir-film pages.  Michael also played in two German films about the Trapp family: "Die Trapp-Familie" (1956) and "Die Trapp-Familie in Amerika" (1958).  These films were made some years before the 1965 U.S. film musical version of the Trapp films, "The Sound of Music" was made.  (The Broadway version appeared in 1959.)  Michael played the role of Werner in the Trapp-films.  (In "The Sound of Music" the boy's name is Kurt.)  Ande like many child actors had difficulty continuing his career as an adult actor.  He had problems being accepted as adult actor as he had such a youthful-looking face.

Anthony Ainley: Anthony Ainley (20 August 1932 – 3 May 2004) was an English actor best known for his work on British television and particularly for his role as the Master in "Doctor Who".  He was the fourth actor to play the role of the Master, and the first actor to portray the Master as a recurring role after the death of Roger Delgado in 1973.

Gustaf Skarsgård: Gustaf Caspar Orm Skarsgård (] ; born 12 November 1980) is a Swedish actor.  He is best known outside Scandinavia for his role as Floki in the History Channel series "Vikings" as well as for his roles in the films "Evil" (2003), "The Way Back" (2010) and "Kon-Tiki" (2012).

Nathan Fillion: Nathan Christopher Fillion ( ; born March 27, 1971) is a Canadian-American actor and voice actor best known for his role as Richard Castle on the ABC series "Castle", as well as his earlier portrayal of the lead role of Captain Malcolm Reynolds in the television series "Firefly" and its feature film continuation, "Serenity".

Vinod Kovoor: Vinod Kovoor is an Indian film actor best known for his work in Malayalam cinema.  He got fame with his role Moidu in the popular comedy show "Marimayam" broadcast by Mazhavil Manorama, which conveys a real picture of public offices in Kerala.  He is also known for his role as "Moosakka" in "M80 Moosa", a serial in Media one channel.  He has written books on his favorite realm mimicry and mono-act.  His first book "Ekabhinaya Samaharam" has 25 scripts, and most of it deals with social issues and his second book "Kalolsavam Monoact" was also released.  He got Best actor Award for the short film "Athe Karanathal" from the National Film Festival.  He was best actor for consecutively four years in Kerala Kalolsavam.  He won best Excellency award by Rotary, J.C.I.  He also received Best Television Anchor Award by K.C.L, Best Comedy artist Award by Kerala Hasyavedi, Kazhcha Award and Best child artist award for the drama "Chandrolsavam" in Kambissery Nadakolsavam . His achayan role in the super hit short film "Nerariyathe" critically acclaimed.

Lorentz &amp; Sakarias: Lorentz & Sakarias is a hip-hop duo from Stockholm, Sweden consisting of Lorentz Berger and Sakarias Berger.  In their career, they have released two full-length albums.  They have collaborated with jj, Duvchi, Newkid and Gustaf Skarsgård.

Clive Standen: Clive James Standen (born 22 July 1981) is a British actor best known for playing Rollo in the History Channel TV series "Vikings", Sir Gawain in the Starz series "Camelot", Archer in the BBC TV series "Robin Hood", and Private Carl Harris in the British sci-fi show "Doctor Who".

Supporting paragraphs: Lorentz &amp; Sakarias Gustaf Skarsgård
Answer: Floki