Well the obvious guy would be Felix Hernandez.
Also Cole Hamels, and Scott Kazmir, who is still Young.
If you want more sleeperish guys try Luke Hochevar, A. Reyes, and the Millers.
"I do not think baseball of today is any better than it was 30 years ago... I still think Radbourne is the greatest of the pitchers." John Sullivan 1914-Old athletes never change.