"The Best of Leon," "My Favorite Leon Part," "Leon Awesomeness" — these are all YouTube titles. The clips are taken from Larry David's long-running HBO sitcom, "Curb Your Enthusiasm."
In the videos, David, the show's neurotic protagonist, is a mere foil. That's because the real star is 47-year-old comedian J.B. Smoove, aka Leon Black and the outspoken half of one of TV's funniest — and unlikeliest — odd couples.
Smoove, a former "Saturday Night Live" writer, has been featured on TV (Fox's "'Til Death") and on film (most recently "Hall Pass" and "We Bought a Zoo"), but it's safe to say his role as...