Dr Dre is A MT Rushmore rap producer while Timbaland is more known for Rnb/Pop
Nah, Tim is a celebrated Hip Hop producer. He isn't Dre status, but he's still considered an upper echelon Hip Hop producer. Tim was giving out hits to unknown artists and had people checking for and copping their albums for that one song (see Magoo, Petey Pablo, and Bubba). What tarnishes Timbaland's catalog, is he gave incredible beats to sub par artists, which is pretty much true of some other greats. The difference is he doesn't have Illmatic, Chronic, Only Built 4 Cuban Linx level material in his catalog. His sound is still associated with Hip Hop even when he branches off and does other genres, which is how he managed to legitimize JT as a solo artist, revamp and reconstruct Nelly Furtado's career etc.