I'll give a few. There are other mons I didnt list but they're usually either gimmicks (like Flygon) or need extra care when switching in.
Support set:
Primary checks: Arceus-Ground, Latias (care for twave/dtail), Latios (see Latias), Giratina-O (requires either Draco Meteor or Earthquake)
Secondary answers: Rayquaza (Mixed. Or if you're man enough (or dumb?) to run Surf), Ho-Oh (if no stone edge), Primal Kyogre (can also be checked by PDon itself unfortunately), Landorus-T (avoid Lava Plume), Yveltal (no Stone Edge)
Double "Dance" PDon:
General check: Arceus-Ground
If coverage move is Dragon Claw: Yveltal, Ho-Oh, Landorus-T, Shaymin-S, Arceus-Grass, Lugia
If coverage move is Stone Edge: Giratina-O, Latias, Latios, Arceus-Grass, Lugia (to some extent), Landorus-T
If coverage move is Fire Punch: Giratina-O, Latias, Latios, Ho-Oh (to some extent - +2 Fire Punch does a LOT), Rayquaza
RP 3 Attacks:
General checks: Arceus-Ground, Lugia, Giratina-O
If the attacks are PBlade/Stone Edge/Fire Punch or Overheat: Latias, Latios,
If the attacks are PBlade/Dragon Claw/Fire move: Lugia, Ho-Oh, bulky Yveltal
If the attacks are PBlade/Dragon Claw/Stone Edge: Arceus-Grass, regular Groudon (lol), Landorus-T. Just use whatever you used to check the old RPDon, minus water moves.
Swords Dance 3 attacks:
General checks: Get something with >306 speed and strong special moves. Lati@s is a good example. Also Arceus-Ground
Other note: If you're slower than it you'll probably die