The 5x5 is very nice, and the 3x5 isn't bad either. Unfortunately neither of them have all of ASCII. The size is also a bit misleading because you need to add spacing so really they need a 6x6 or 4x6 grid.

I'm quite fond of Spleen:

https://github.com/fcambus/spleen

It has a 5x8 font which has all of ASCII, but most glyphs are actually 4x8 and include horizontal spacing. I modified it to reduce the rest for a project I'm doing so all glyphs are 4x8. The result can be rendered on a 5x9 grid with a guaranteed line of horizontal and vertical spacing between all glyphs. It's very nice.