1. Wil Wheaton
Like him or not, Wil Wheaton has really done a swell job at reinventing himself as of late.
Growing up, he was the star of two mega-hits: the sci-fi TV series Star Trek and the Stephen King adaptation Stand by Me. The latter show was another inspiration for Stranger Things. These two projects couldn’t be more different, and they really showcase Wheaton’s versatility (at least, as a child actor).
These days, he’s taken more to the nerd scene. He frequently guest stars as himself on the popular CBS show The Big Bang Theory and very briefly even hosted his own pop-culture commentary show on SyFy. Sure, he’s not playing a character in either of these shows, but he’s still seen a reinvigorated career (at least since the beginning of his stint with Big Bang).
Could he handle a dramatic character at his current age? I’m not sure. Still, it would seem that he’s actively looking to get involved with nerd culture again, so he may be open to the opportunity to appear in Stranger Things 3.
My primary reason for putting him on this list is his extended background in sci-fi and fantasy, as well as his work on a Stephen King adaptation. It’d be nice to see a familiar face, just as we did with Sean Astin and Paul Reiser last season. It would also seem reasonable to assume that he understands the Duffer Brothers’ creative direction, so I think that’d he’d make a decent addition to the cast.