Recently I hatched a perfect Pichu and a perfect Growlithe on the same week, so that's pretty nice. I'm not going to evolve that Pichu because I'm never using a Raichu anywhere and at 215 I can't get a higher CP for a Pichu without wasting stardust on one. I don't know what I should do with my Arcanine, because the moveset didn't turn out that great and I'm already well equipped with good fire-type attackers, one of which is a ~90% Arcanine with Fire Fang and Fire Blast.
My only really useful one is my perfect Exeggutor (raided), probably the best grass-type attacker in the game with Bullet Seed and Solar Beam. Perfect Forretress (hatched) and perfect Wigglytuff (caught) might be decent at defending some gyms, I don't know. I've got two more, but they're trash no matter how you look at them: Pidgeot and Sunflora (both caught).