Pupitar

that iv is nothing to be ashamed of. id evolve it and buddy up if the moveset is worth powering up

The event is over, if you weren't seeing Larvitar in the wild before, you probably won't now either. So you may as well evolve this Pupitar if you haven't found a better one in how many months of playing.

Tyranitar often still has higher max CP than perfect Dragonites even with average IVs and yours are pretty good, so I wouldn't worry too much about it.

Though a level 20 Tyranitar isn't very usable, so I would hold off on evolving until you have enough candies to evolve and power up. Once you do, evolve it if you have not found a better one by then

From your post, I assume that you don't have a T-tar yet. I would evolve it and see what you get. If it gets Bite, it will be useful without powering. If it gets iron tail, you'll have a choice to make.