Wals... some day, you are going to have to explain Montgomery to me
For me, as a non-brit, somebody like, say Harold Alexander looks like a better general. More concerned about winning the damn war than creating a cult of personality around himself.
Kesselring, well, that would be a toss up between him and Manstein. Manteufel gets the price for coolest name though
The russians have Конев and Жу́ков scrambling for the pole position.
As for the american, japanese, french, dutch, belgian, romanian, australian, croatian, hungarian, italian, greek, finnish etc. generals, I probably don't know as much about them as I should. Not enough to compare them to their national peers anyway