I have one drawer in my toolbox for bike tools...

• Chain tool and cable cutter, flat kit, Orange Seal
• Shock pump
• Bottom bracket and cassette and freewheel sockets, and a chain whip, a spanner wrench for old bottom brackets, a crank puller
• pedal wrench, and cone wrenches (bought as required)
• About 1/4 of the drawer is taken up by a spoke tensiometer in its box, but that's kind of a needless luxury for my skill level at wheel building. I keep a couple of other things in there like spoke wrenches and a long screwdriver bit that I ground down into a nipple driver
• I have a few esoteric tools I only bought for one job, like a pin wrench for turning the eccentric bottom bracket in my tandem, or the Campagnolo offset saddle wrench
• The most recent additions were a headset remover and a headset press - both simple and cheap versions
• But I've also got a few "normal" tools that I save for only bikes so I don't lose them, especially a 4-5-6 triangle Allen wrench, an 8mm Allen socket for most modern cheap crank bolts, a crescent wrench.
• I keep most parts in a separate box. In the tool drawer there are only a few small common parts like cable ends and stem spacers.

All of these were accumulated as required, I did not set out to build a comprehensive collection of bike tools as though I were a shop.

I pull out mechanic tools like the torque wrench as needed

I'm going to need to get a Race Face BB socket next, probably. I hear that the wrench version has problems with the flared out chain stays on Boost bikes