Early in the show's history (1954-1966):
* Steve Allen: Hosted the first version of "The Tonight Show" from 1954 to 1957.
* Jack Paar: Hosted from 1957 to 1962, known for his intellectual humor and spontaneous moments.
* Johnny Carson: The iconic host who defined the show for 30 years, from 1962 to 1992.
Other hosts who could be considered "early" depending on context:
* Jay Leno: Hosted from 1992 to 2009 and again from 2010 to 2014.
* Conan O'Brien: Hosted for a brief period in 2009 before returning to his own show.
* Jimmy Fallon: Has been the host since 2014.
To get a more precise answer, you could specify:
* What time period are you interested in?
* What kind of "early" are you looking for? (Early in the show's history, early in their career, etc.)
Let me know more, and I can give you a more specific answer!