I wanted to get the El Primero for Zeniths but most of the sizes are 44mm which I realised is too big for my wrist. I love my Pam but my wrist aches and I tend to bump against things. Also, the EP dials are on the busy side. The only one I found with EP and is a 40mm size is this one (but a lot of things on the dial):
from what I can gather, u left out another important criteria: which is u probably prefer a black dial watch. While you mentioned about dials being too busy, none of your choices so far are simple time/date combinations either.
Watches with slightly more complications may tend to go beyond 40mm by today's standards..
But not to worry I believe there are still many choices out there. Do check out some of the brands I suggested. I do like JLC Master series and GO alot, though GO black dial models aren't their popular ones. Zenith EP I find most dont' look good actually... just that movement is iconic...
Anyway good luck and share your eventual choice(s) here ya! cheers