I really don't think I have ever seen a better drive in any football game, ever. Elway's drive in Stanford-Cal was similar, but that ended on a field goal. Elway's "The Drive" was 98 yards with 5:32 left.
Forcier's drive was 92 yards with 2:52 left and no timeouts, in the rain, with a hurt shoulder.
Tough loss, but that was truly unbelievable.
EDIT: OK, not best EVER. But it's up there for me. Can we say one of the best in Michigan history? I guess the '79 Indiana game comes to mind, but that was more of a "play" than a drive.