Tech21 dUg Ultrabass - does everything with clarity, clean through too overdrive incorporating a nice ‘tube’ type tone, 2 channels mixed and the ‘distortion’ channel can be set just to be crystal clear and clean to augment the lows.
Form Factor Bi1000 is a wonderfully articulate amp, clean, musical EQ but does not really colour the sound, can make other amps sound like fisher price alternatives
Hartke LH1000 - it’s a beast, I loved the Hartke/Fender tone stack - simple and it executes
Genzler Magellan 800 - best organic drive sound on an amp on the market, beautiful piece of kit.
For me dUg amp rules them all