I actually liked the dubs by Working Designs, though I'm probably in the minority for that. Otherwise, they were almost all lackluster. I did like the choice of narrator for Dragon Slayer: Legend of Heroes, and work done for Ys I & II was surprisingly okay. The voices in Last Alert are HORRIBLE, but nostalgia gives that one some charm. I'll never get over the "OH! OH!" instead of "Uh oh!" in Final zone II, though.
I don't understand why voice acting wasn't taken more seriously in most western releases of the time.