I love the Jet, but I don't think he's as fast as Gale.
I definitely like OJ, but if the question is about pure speed and not speed plus power plus durability, I think it's Gale. What he's capable of on returns is just disgusting.
The Jet has one helluva cutback move and some nice power. When you factor in the speed, you're looking at quite a package. The problem is that there aren't enough plays in the book for the FB.