The thing to do with a 3x5 font is to make the capital N into a giant lowercase n. Then M H and W all become similar letters, just with a different location for the horizontal bar.

That's one of the possibilities, but one can also use asymmetry to evoke an illusion of diagonality, as in this font:

https://fontstruct.com/fontstructions/show/1426620/3x6-pixel...