My vote is for the Lezyne Micro Floor Drive HV, though I would opt for the version without the built in gauge, which I found to become brittle, suffering cracking, in strong sunlight.

When they first came out, you were able to order about every part as a spare, but after a year of trouble free touring use and the gauge giving up the ghost, I was unable to source a replacement gauge at the time.

Being so pleased with the pump otherwise, I replaced the pump with the same model, available without the gauge.

I'd replace with the same again if it gave another issue I've been so happy with it.

Mine sits on the downtube. on the included bracket that sits behind the bottle cage.

It has a velcro wrap to keep it in position and its never fallen from the bike.