Lezyne Micro Floor Drive HV (HVG model has an in-line pressure gauge). It pumps more air than any mini pump, but is light and relatively compact. The fat bike guys found it sufficient.

I bought extra brackets (that go under a bottle cage) so I can swap the Lezyne pump between my bikes.

I prefer a full frame pump (Zefal HPX is great), but only two of my bikes have pump pegs on the frame.