The best dub imo was yu yu hakusho. and this is coming from someone who has seen both versions.
Voices were quite true to the original. I liked how instead of trying to sound exactly like the japanese voices, they gave them there equivalents in american culture(kurama had an effeminate voice in the original, so they gave him a "Proper" type voice, which would be considered effeminate in american culture)
DOn't know what the hell was with making Jin Irish, but w/e.
DBZ dub was terrible. Voices are just as off as naruto. You probably saw the US version first tho. If you'd have seen naruto first, you'd prefer those.
as for the bleach dub......its pretty decent. I like how the humor in the show is maintained, which it usually isn't in the dub, and voices fit characters pretty well. I just wish they spoke with more feeling and all sounded less generic. Naruto dub has the same problem. Everyone sounds the same.....and boring.