I gotta hand the best drop on a wooden coaster to El Toro in the back seat. First its the steepest woodie on earth but combined with an extremely fast cable lift and a great headchopper at the bottom this drop takes the cake.
Lets stay away from the obvious answers of KK and TTD...its to easy.
For me El Toro has an amazing feel of speed that it keeps up almost to the very end.