What is considered a good pokemon now

[Milly]

I recently got back into an account I used to bot on, I have multiple dragonite, snorlax, vaporeon at 2600cp+ are these still decent or what is super crazy now

[Star Dream]

I'd definitely still consider those "good". Most of my battlers are in the 1500-2500 range, with a handful hovering in the 2800-3500 range depending on species and IVs.

To me, a Pokemon is good if its CP is high enough, if it has really good IVs and won't take too much investment to hit good CP, or if it's some combination of these two things. I've always been a stickler for perfect IVs in main Pokemon games, so usually I hold onto something with amazing stats in GO as well.

[Delibird]

Smack Down Tyranitars are good (Only from C-day move).
Metagross with Meteor Mash (Only C-day move)
Rhyperior
Togekiss
Outrage Snorlax
Shadow Ball Mewtwo

Ofc only if the pokes are 100iv and not crap ivs. (below 90)