If there was ever a better guy to fill in Tim Riley's shoes, there's been no question it was Jeff. Honestly through the changes of bass singers, what with Aaron, Chris, (not to take anything from these guys as they are equally amazing in their own ways) I've always felt it was just a matter of time until Jeff got the call. I will say, (and this is just my opinion) the other guy I could see holding up to Tim's standards would be Christian Davis
I cant think of anyone other then Jeff filling this role as its meant to be. Nothing against Aaron or Chris (both killer in thier own ways). I will say, the only other i think of is Christian Davis