Dam I lied, I got lazy and didn't do anything...
Ive used cofag in this meta, its pretty good but not exactly great stall material. Why? it has a shit recovery plan, you are left with pain split or rest, I know doughboy loves pain split to the cows come home, but honestly, rest is the only way you are getting your health back up. You are honestly much better packing a cleric than using pain split in my humble opinion. Also Dusclops has some perks on a stall team, although it does overlap with Confagrigus I admit. Dusclops bulk is crazy sexy though, its literally the only pokemon that I know of that can take any move from Cb dragonite with ease.
On a cleric, they can be used, but you have to have a reason for them. For example if you are using a pokemon or two with rest, it is an option to consider. Otherwise there are generally better options. As alkin said Chansey / Blissey are usually packed for slots, but if you can fit a Roserade on your team, usually it can have the extra slot for aroma therapy.
Also, every stall team NEEDS spikes, I have tried to run with without them, don't do it. Sure against offensive teams all you need is rocks, but against any sort of balanced them, you will be wishing you had spikes.