Depending on likenesses absolutely if it were Hot Toys/Enterbay quality.
Star Trek (a couple of great customs are already going)--all five series crews plus iconic aliens
Battlestar Galactica (great custom going from WGP)
Batman (Batman, Robin, Batgirl, Catwoman/Julie Newmar version, Joker, Riddler, Penguin)
Green Hornet & Kato
Gilligan's Island (Gilligan, Skipper, Ginger, MaryAnne, Professor, Mr. & Mrs. Howell)
I Dream of Jeannie (Jeannie, Jeannie's evil sister, Major Nelson, Major Healey)
Bewitched (Sam, Serena, ____ York Darrin, Endora)
Wild Wild West (Jim, Artemis and the little person Villain)
Lost in Space
Buck Rogers in the 25th Century
Monkees (Davy, Micky, Peter, Mike)
Six Million Dollar Man/Bionic Woman
Avengers (Steed and Emma Peel)
UFO (gotta love the purple wigs)
Babylon 5 (great alien designs)
Andromeda (year 2-3, Tyr but not the bat faced guy)
Hercules and Xena
Kiss (Gene, Paul, Ace, Peter -- though not a TV show, they did TV specials)
Elvis (also did TV specials and appearances)
Some 70s movies would also be great
Logan's Run
Fantastic Voyage
Sinbad