The Tonight Show dominates Jimmy Fallon's similarity graph at 0.92 — a gap that sets it apart from every other neighbor in the top 10. From there, the field spreads wide across a genuinely mixed set of subcategories, consistent with the broad shape of this audience.
The next tier clusters around actors and comedians. Tom Hanks is the second-strongest match at 0.83, followed by Craig Ferguson (0.77, Comedians) and Rob Lowe (0.76, Actors). Bob Newhart (0.76) adds a second comedian to that band. What's notable is the cross-kind composition: Fallon's subcategory is TV Personalities, and only two neighbors in the top 10 share it — Seth MacFarlane at 0.72 and Alex Guarnaschelli at 0.72. Actors account for three slots (Tom Hanks, Rob Lowe, Kiefer Sutherland at 0.73), comedians two, and the remaining positions go to a website (NBC Sports EDGE Betting, 0.76), another website (Eat This, Not That!, 0.75), a beauty brand (Dollar Shave Club, 0.74), and an athlete (Zach Boychuk, 0.73).
That spread — actors, comedians, a sports-betting site, a food-and-health website, a grooming brand, and an athlete all landing within a 10-point band — signals an audience whose shape is defined less by any single content category than by a broad, mainstream entertainment profile with a notable sports-adjacent current running through it.