For a 'fat' lead tone, in my experience for the bridge (warpig, ceramic warpig, miracle man, painkiller, nailbomb, crawler) I'd say nailbomb. Really ballsy and gutsy. Only thing to beware of with the nailbomb is its probably the least tight of those I've tried. Still way better than a JB though.
For fat and tight, painkiller. Painkillers do a stunning lamb of god sound, too :twisted: