This quiz is pretty damn hard except maybe for diehard animation enthusiasts that grew up in the 80s and 90s. Though... some people that fit that description must have taken this quiz otherwise there's no way to explain how so many of these actors (that most people have never heard of before- such as the voice of Arthur, or Eeyore/Optimus Prime, or Abu/Megatron/Stripe) end up more-guessed than Lady Eeboshi in the Princess Mononoke dub.
Just stumbled across this one years after you posted it and was surprised to not see Jim Cummings on here (first two names I typed in without even reading clues were Welker and Cummings). Nice to see you mentioned him in the comments anyway!
Another favorite of mine to maybe add if you ever do another is Katie Leigh, and of course the magnificent June Foray!
Another favorite of mine to maybe add if you ever do another is Katie Leigh, and of course the magnificent June Foray!