There's going to be something of a theme here...
Ninetales @ Leftovers
Ability: Flash Fire
EVs: 248 HP / 8 SpD / 252 Spe
Timid Nature
- Flamethrower
- Toxic
- Protect
- Substitute
Carracosta @ Leftovers / Rocky Helmet
Ability: Solid Rock
EVs: 252 HP / 64 Def / 192 SpD
Impish Nature
- Stealth Rock
- Knock Off
- Toxic
- Protect
Piloswine @Eviolite
Ability: Thick Fat
EVs: 248 HP / 252 Def / 8 SpD
Impish Nature
- Earthquake
- Ice Shard
- Roar
- Toxic
Meet stallTales, stallaCosta, and stalloSwine!
Ninetales is your lovely every day Fire counter, switches into Fire attacks for days, sets up a sub, proceeds to Toxic stall everything with its lovely 100 base speed. Flamethrower ensures that Roselia and Metang can't dick around and ruin your fun. No real leeway with item/moveslots there but you can play around with your speed EVs to have more special bulk if you like. Takes advantage of Misdreavus, Leafeon, Ninetales, Roselia to an extent, Scyther, Regice, Tangela, and Gourgeist among others. Requires far more support than normal Ninetales with hazard removal as it won't be sweeping teams like NP Ninetales does.
Carracosta and Piloswine form a lovely answer to physical attacks. Carracosta can use a whole bunch of different move options but for Toxic stall I enjoy the above, Knock Off carries the utility while Stealth Rock frees up a far more valuable moveslot on Piloswine while ProTox is a pain in the ass to deal with. EVs are flexible, I chose a version with special bulk to switch in on Fire Blasts and Ice Beams and what not as Costa's base Sdef is already massive. This is your first switch in to Tauros, Scyther, Lickilicky, Bouffalant, Chatot, Dodrio, Flareon, Purugly, Stoutland, etc; and a secondary switch in to Sneasel and co. Given how much it can abuse physical attackers, consider Rocky Helmet if you have Wish support to keep Costa healthy.
You'll also notice that I love having Protect on defensive Pokemon without natural recovery of their own, very helpful in keeping the team alive.
Finally, utility Piloswine. Earthquake and Ice Shard are mandatory, the former for the coverage and power it gets even uninvested, the latter for taking out Birds and weakened sweepers (i.e. Ursaring) before they do too much damage. Ordinarily Stealth Rock is used on Piloswine but I think that undersells one of Pilos greatest advantages for stall teams in Roar. Piloswine is one of the few that gets Roar, can fit in on a moveslot, and is both bulky and forces switches to rack up hazard damage. Adding Toxic and Roar adds to the fun when Piloswine is so bulky. EVs and moveslot are flexible with your team, you can add more attack and attacks, add Stealth Rock, go specially defensive, etc. I like the physically bulky set as it allows me a secondary Tauros check and switch ins to Barbaracleand Carracosta on top of all the other things it ordinarily checks.
In case anyone was wondering I run the latter two alongside Roselia, Encore Poliwrath, Taunt Misdreavus, and Lickilicky at the moment.