David Ortiz would be without the steroid allegations. A-Rod obviously has the same problem (and to a greater extent).
Otherwise, Ichiro is the next guy who is a no-doubter, and he's not eligible until 2025:
There are others who might get in, like Beltre, Mauer or K-Rod, but I don't know that they're obvious choices.
It will be interesting to see whether some of these guys get in (I know next year is the last chance for Bonds, Clemens and Schilling) or if we don't have any new HoFers for several years.
it might be that clearing some of these guys like Bonds and Clemens off the ballot might help other guys, though.