I don't know what happened to my post above, but, with tounge in cheek, I mentioned the actors I had most of:
Tom London, Moe Howard, Larry Fine, Bud Osbourne, Kenne Duncan, Eddie Parker, Alan Jenks, Spanky McFarland, etc.
As for horror, if you count TV apperaraces, I think Karloff is king in my collection.  THRILLER alone, for example has 67 appearances.