Tyranitar is currently the best dark type attacker in game, using it shouldn't even be a question. Absolutely evolve the level 35 one, a premier attacker with zero dust investment is too good to pass up.
Between your other two I'd pick the 13/15/13 over the 10/15/15 (assuming a/d/s/ IVs). You can't really go wrong with any raid/egg quality Tyranitar, though with it being a current and relatively easy raid boss I'd be tempted to try for a higher attack IV one first. Especially if partly cloudy is common in your area.