1. Mike Piazza
2. Tim Raines
3. Craig Biggio
4. Jack Morris
5. Jeff Bagwell
6. Tom Glavine
7. Greg Maddux
8. Frank Thomas
9. Tommy John
10. Randy Johnson
11. Pedro Martinez
12. John Smoltz
13. Fred McGriff
14. Edgar Martinez
15. Ken Griffey Jr.
16. Trevor Hoffman
17. Ivan Rodriguez
18. Dick Allen
19. Chipper Jones
20. Mariano Rivera
I agree with this list except for Tommy John, not sure if he's good enough for the HOF, even if his surgery is! I know you said no PED guys but Barry Bonds has to be in IMO.
I think Mike Mussina, Jim Kaat, Andy Pettitte and Lee Smith will also get in soon. All had efficient and productive careers and I think deserve a plaque.