Question: Who played felix unger in the odd couple?

Disambiguated questions and answers:
context: The Odd Couple, formally titled onscreen Neil Simon's The Odd Couple, is an American television situation comedy broadcast from September 24, 1970, to March 7, 1975, on ABC. It stars Tony Randall as Felix Unger and Jack Klugman as Oscar Madison, and was the first of several sitcoms developed by Garry Marshall for Paramount Television. The show is based on the 1965 play of the same name, which was written by Neil Simon, as well as on the play's 1968 film adaptation. Felix and Oscar are both divorced. They share a Manhattan apartment, and their different lifestyles inevitably lead to conflicts and laughs.
question: Who played felix unger in the 1970 tv series the odd couple?
short_answers: Tony Randall
Randall
wikipage: The Odd Couple (1970 TV series)
context: Another American remake, also called "The Odd Couple", aired on CBS for three seasons from 2015 to 2017. This version, a multi-camera sitcom, was co-created and co-produced by Matthew Perry, who played Oscar, while Thomas Lennon played Felix.
question: Who played felix unger in the 2015 tv series the odd couple?
short_answers: Lennon
Thomas Lennon
wikipage: The Odd Couple (1970 TV series)
context: In 1968, "The Odd Couple" was made into a highly successful film starring Jack Lemmon as Felix and Walter Matthau (once more) as Oscar. Most of the script from the play is the same, although the setting is expanded: instead of taking place entirely in Oscar's apartment, some scenes take place at various outside locations. The film was also written by Simon (who was nominated for an Academy Award) and was directed by Gene Saks.
question: Who played felix unger in the 1968 film the odd couple?
short_answers: Lemmon
Jack Lemmon
wikipage: The Odd Couple (play)
context: "The Odd Couple" was originally produced for Broadway and the original cast starred Art Carney as Felix and Walter Matthau as Oscar. For the film version, Matthau reprised his role as Oscar, and Felix was portrayed by Jack Lemmon, who had never played the character before. At one point, Frank Sinatra (as Felix) and Jackie Gleason (as Oscar) were reportedly considered for the film version. Dick Van Dyke and Tony Randall were also among those considered for the role of Felix (the latter portrayed him in the TV series). Similarly, Jack Klugman (who aside from the TV series had replaced Matthau on Broadway) and Mickey Rooney were also to play Oscar. Most of the script from the play has been retained, although the setting is expanded: instead of taking place entirely in Oscar's apartment, Simon also added some scenes that take place at various outdoor New York City locations (such as the scene at Shea Stadium in Queens, New York).
question: Who played felix unger in the original the odd couple on broadway in 1965?
short_answers: Carney
Art Carney
wikipage: The Odd Couple (film)

Long-form answers:
long_answer: There have been multiple shows titled The Odd Couple. Art Carney took the stage as Felix Unger in the original The Odd Couple on Broadway in 1965. The 1968 film cast Jack Lemmon as Felix. In the 1970 TV series, Tony Randall played the role. There was also a 2015 TV series remake. This version, a multi-camera sitcom, was co-created and co-produced by Matthew Perry, who played Oscar, while Thomas Lennon played Felix.