I just started binge-watching the original Maverick TV series (1957-1962), with Bret (James Garner), Bart (Jack Kelly), Beau (Roger Moore), and Brent (Robert Colbert).
I have, of course, seen them all before, more than once, but it's been a while. It has always been a favorite and particularly interesting, given the alternating characters. It ranks high among the TV series that I've seen.
It began with Bret; Bart didn't appear until episode 8 of the first season. Then the two of them sometimes appeared singly and sometimes together. Beau and Brent didn't show up until the fourth season, after Bret and Bart left, although Brent was in only a few episodes.
When I finish the original series, if I can find them, I'll watch Bret Maverick (1981), Young Maverick (1979), and The New Maverick (1978).
One that I haven't see, but which looks interesting, is The Gambler Returns: The Luck of the Draw (1991), which isn't a Maverick movie, although it includes a cameo by Jack Kelly as Bart Maverick, along with Gene Barry as Bat Masterson, Hugh O'Brian as Wyatt Earp, Chuck Connors as the Rifleman, Johhny Crawford as Mark Connors, David Carradine as Caine from Kung Fu, Brian Keith from the Westerner, and Clint Walker as Chyeenne Bodie.