Steel: Top Thrill Dragster (420 ft.)
Wood: Screamin' Eagle (110 ft.) or Outlaw Run (168 ft.)
I put two for wood, because technically Outlaw Run is only 107 ft. tall. The drop is 168 ft. tall though, so it comes down to which part of the ride you're counting.
Top 10: 1. Steel Vengeance 2. Maverick 3. Monster (Adventureland) 4. Outlaw Run 5. Beast 6. Storm Chaser (Kentucky Kingdom) 7. Incredible Hulk 8. Goliath (Great America) 9. Mystic Timbers 10. Rougarou