So far what I know of is the GK MB800 (and fusion version) and the Tecamp Puma 900
I did this not too long ago, & that's about all I found, plus the Demeter 800d which is a power amp. Everything else is a bit bigger including the GBs. While it's not perfect for what I want, I went with the GK because of the combination of low cost, high power, and crazy portability.
Here's the list I assembled including various details:
GK mb800/mb fusion 800: 800w@4, 500@8; mb: 11x8.5x2 5 lbs; fusion: 12.25x11x2 6 lbs
Peavey MiniMega: 1000w @ 4, 700@8; 9 lbs [if it ever comes out!]
Carvin B2000: 700w@8 ohms, 1300@4, 1 preamp tube, 19x10.5x3.5”, 14 lbs; TB: warm, simple (BX1600 more modern)
Genz Benz Streamliner 900: 900w@4 500w@8; 6.5 lbs 10x12x3.25”
Genz Benz Shuttle 9.0 and 9.2 900w@4 ohm, 500@8; 10x10.5x2.5, 4 lbs
Ampeg SVT7Pro: 1000@4/600@8; 15.5lbs 16x11.5x4"
Ampeg Portaflex 800: 12lbs; 15x11x3; 800@4, 400@8
Orange Terror Bass 1000: 1000w@4, 900@8; 10x12x6” 11 lbs (TB500 500@4 and 8)
Markbass SD 1200: 750@8, 1200@4; 15x12x4, 9 lbs
Markbass Little Mark tube 800: 11x10x3 6 lbs; 500w@8, 800w@4
Hartke LH1000: 19” 30 something lbs
Bugera Veyron Tube BV 1001T: “2000w"
Trickfish Bullhead 1k 1000w@4
JGR Studio 1200
Tecamp Puma 900 900w@4, 600w@8, 2.2lbs
POWER AMPS
Crest Prolite 2.0 Power Amp: 1160w bridged @ 8 ohms (sensitivity .775 at 4ohms); 290 stereo @8, 600@4; 19x10.5x3.5”, 12 lbs
Crest Prolite 3.0: 450w per ch @ 8, 870@4, 1770/3150 8/4 bridged; 19x10.5x3.5, 14 lbs; .740v@4
Crest CA9: 600w@8, 900@4 (1800/2000 bridged); .775v input @8 ohm; 52 lbs
Carvin DCM2000 Power Amp: 400w@8/1200 bridged @ 8; 700/2000@4; 14 lbs; 2 channel; 1.000v@4
Carvin HD power amps: sensitivity 1.4 into 8ohm; DC series 1@4
Demeter Minnie 800d: 800w@4, 4/500@8; 10x6x2, 3.5lbs
Demeter m700 700w@4; 12x12x5, 7lbs