Hard to say, Jaleel White, Jun'ichi Kanemaru and Ryan Drummond are definitely in my top three. I also really liked Jason Griffith, in particular that cocky chuckle he gave to Sonic.
There hasn't really been any actor for Sonic I haven't liked, with Sonic's Schoolhouse being an exception. I don't really like Roger Craig Smith, on one hand I don't think I can accurately give my opinion on his take because he hasn't been in a story that didn't leave me sighing and rolling my eyes, but on the other hand I think his voice is too deep and gruff for a high-speed youthful teenager.
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