We've covered lousy actors and questionable singers. A further spin-off: who really isn't that funny, past or present? I offer:
Hale and Pace
Freddie Starr
Lenny Henry
Mean-spirited, I know.
On the plus side, I did like Jimmy Tarbuck. I'm probably being unfashionable but his delivery as a stand-up was perfect, even if some of the jokes wouldn't go down well today.