In my opinion these guys are amazing voice actors
video: paper Mario wiki bone zone cock block

Crashboombanger best MAJESTIC FANTASTIC AMAZING BEAUTIFUL Mettaton and a decent papyrus

Grillbysbarandresturant HOTTEST AND I MEAN HOTTEST Grillby voice mainly NSFW so be wary

Papermariowiki
Best sans and good papyrus

ThisblogisaPUNishment
Tbh his voice isn't very accurate but I do enjoy it for sans and Gaster and he does have nsfw blog so be wary while searching