After reading through this thread, I've been using a Golduck with Surf/Psychic/HP Grass/Signal Beam (thanks a ton, SJCrew. :D). Expert Belt is probably the best bet for the item, and a Timid 252/252/4 in Spe/SpA/HP lets it tie with Toxicroak. Not sure what everyone else is using, but that's my choice.
Golduck isn't the epitome of "bulky", but it can take a hit or two, from the few battles I've played with it. I suppose HP Ice could work better for coverage, but HP Grass does allow it to hit the RBY Fossils.
It might be possible to run Focus Punch to deal with Chansey and the like (outside of Weather teams), but you lose coverage somewhere if you do so. Although FP over HP Grass still allows it to hit a fossil on a switch, SD, etc... You'd have to change some of the EVs around, possibly, and it'd require more prediction.
I'm a newb to UU, so I'm probably overlooking a lot. :P
there would be no need to use FP on goldduck when he gets cross chop.