No-mid-hump overdrive?

gringopig

.

Kebabkid

Another +1 for the JRAD GTO and the OCD V 1.4 in the lower gain registers is very good

YellowLedBetterMan

DOD Looking Glass or the Greer Lightspeed

roberty

Not being funny but the Hudson Broadcast is amazing at low gain (and high!) - magical little box

Beexter

Barber Gain Changer

John_P

  bb preamp and Timmy or Jan Ray are next on my list,  I they’d make nice boost and hopefully stack together well.  

HAL9000

Another vote for the Boss Blues Driver.

DrJazzTap

guvnor 2, can be picked up for less than £20.