I like the statement of standby standouts...

mine would be the Rat and Turbo Rat with LM308 op amp, Reverend Drivetrain II, Boss DS-2 Turbo Distortion, MXR Micro Amp, Line 6 Verbzilla, Small Clone chorus

and lately, colorsound one knob fuzz (clone), keeley java boost (clone), modified/original Rebote 2.5 delay with circuit elements from the Skreddy Echo, also the Akai Headrush II is very impressive and useful. Probably Demeter Tremulator (clone with IC substitution for TL072) for amps without tremolo.

can/have get a lot done with these on various amplifiers and musical settings. I've gone through dozens of other pedals that don't get plugged in as often for formal music work.