Right now, there is no foil to Lebron. He is unique at this moment in size, strength, and skill as a package, probably most comparable to Bird and Magic (who are/were all around the same size, ironically).
To play in the same era as them would likely mean, IMO, he would fare no better or worse than those guys. In that case, he's a peer of the bunch, not the standout supreme deity he is being portrayed as now.
That said...
Right now, nobody can really keep him out of the paint on a drive. In the 80's, he would have had more trouble most of the time, and may not have been able to simply drive to the hoop for game winners or and-1's anywhere near as often. Given that and his inability to master the outside shot, he would have been an also-ran in the 80's behind Bird easily. 1 on 1, it would have been a pull-up contest, with Bird winning in a landslide (of course).
Still, as the best player of his era, Lebron can and likely will attain Wilt status.
If the league continues the rules/game as it is and he remains healthy, his presence alone makes a team a contender, much as Wilt would have back then.
And he's bound to win some.
But this thing in Miami could just as well go to heck, it could go Lebron and the Lebronairres, and they could end up having had a peak similar to the Bad Boy Pistons back-to-back titles between the Celtic and Bulls dynasties in the East.
Lebron may have won a title (or two, maybe) between our run (which ended Detroit's) and the next one (Nets? Indy?).