Well, this is a question, but I think it's best answered by the experts here rather than in SQSA.
I was going over some Pokemon and sets and I noticed that in UU, Lapras IMO does a better job than Lanturn in stopping the popular Rain Dance teams running around.
I have come up with 2 sets that I think would work well.
1. Hydro Pump/Thunder/Blizzard/Heal Bell @ Wide Lens (Dragon Pulse is omitted because again, I plan to use this in UU where there is no Kingdra.) Wide Lens is for the powerful inaccurate moves, and I will use a defensive sprad so Lapras can afford to miss. Toxic is a huge problem for tanks like Lapras, so Heal Bell is slapped on.
2. Whirlpool/Perish Song/Ice Beam/Protect @ Wide Lens/Leftovers
Perish-Trap. Wide Lens, again, is for accuracy on Whirlpool, Protect semi-stalls, and Ice Beam is for everything it doesn't kill, particularily the odd whirlwinding flying type. I plan on a full defensive spread for this.
Or if both of these are awful, please give me some suggestion.
On the issue of Swellow, I'm considering using it as a lead. Please tell me how in the hell it hurts Aggron/Probopass, both of which are 4x resistance to its STABs. I think those are its two definite counters, throwing the whole 'move it out of UU' out the window. It doesn't even get Rock Smash, and the loss of HP Ground was the thing that hurt Swellow the most. I agree with everyone who said that Rock types with high defense are plentiful in UU, and that it can be easily stopped. And it lasts even less with the introduction of Brave Bird, which I do not believe was mentioned in the whole timebomb diatribe.