Bela Lugosi. Karloff was around at least long enough to narrate “How The Grinch Stole Christmas”.
They were nice guys off camera, and did some wonderful interviews which are hard to find.
My favorite was the shlocky "Comedy of Terrors" when all three played horror for laughs. Favorite gag--Price was a funeral operator who sold and resold the same casket. He'd dig up the corpse, steal the casket, and sell it again an again...