Park tool is good go-to for shop grade stuff. They sometimes have two versions of a tool, a cheaper home and shop grade version. The home stuff is perfectly decent (Craftsman grade). Pedro's also makes similar quality stuff. If you want truly exceptional, Abbey Bike Tools, which are borderline between tool & art...

Dedicated stuff you might want:
1) Bottom bracket and/or crank tool appropriate for your bikes (Shimano external, square taper, any of the press-fit standards). There's like 10 different versions of this stuff now, so just get the one you need.
2) Lock-ring remover. Since you've got automotive stuff, just get one with a 3/8-drive.
3) Chain whip or cassette pliers.
4) Cable & housing cutters (if you don't have an automotive version).
5) Pedal wrench

Beyond that there's a ton of small stuff specific to various bikes. Adapters and things for bleeding brakes, etc.