Danny Kaye did all sorts of accents and silly songs and crazy routines. Along with more routine "serious" stuff.
I have to imagine that Mel Blanc, along with the other guys at WB animation department, were big fans of his. I'm sure he could have been an AMAZING voice actor, if celeb voice actors had been a thing back in that era.
If anybody from that golden era of Hollywood gets "rediscovered" by a younger generation, I hope it's Danny Kaye. I think you guys would like him.
Incidentally, if any of you have played the last couple of Fallout games, you've already heard him. He's the guy who does "Bongo Bongo Bongo (I don't want to leave the Congo)."