I think Undertaker's bio would make for an interesting read at least...
Vader would be another one I would pick up, He's traveled & worked all over the world.
Also, I've always thought that "Dangerous" Dan Spivey would have an interesting story to tell. He's been to Mexico, Japan, wrestled at a Wrestlemania & as far as I know is still in active competition. Some of you may remember him from years back as one of my favorite WWE characters of all time, Waylon Mercy