Let's Rank The Host...
"The Tonight Show is an American late-night talk show currently broadcast from the NBC Studios in Rockefeller Center in New York City, the show's original location (a tradition interrupted by decades of originating from various studios in the Los Angeles region), and it has aired on NBC since 1954."
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https://en.wikipedia.org/wiki/The_Tonight_Show
1. Johnny Carson (1962–1992)
2. Steve Allen (1954–1957)
3. Jay Leno (1992–2009, 2010–2014)
4. Jack Parr (1957–1962)
5. Conan O' Brien (2009–2010)
6. Jimmy Fallon (2014- )