I think a 9mm 1911 by far has the least recoil.
CZ 75's are real nice and soft, better than the High Power IMO.
Sig P226 isn't bad, even with the alloy frame.
I like Glocks, but felt recoil isn't low.
As far as the Marlin camp carbine, I disagree, I think it has more recoil than expected because of the plain blow back action. A M1 carbine is much lower by comparison.
I was shooting my Camp 9 yesterday with hot handloads and the recoil felt like more than I was getting from my Glock 17L.
The Ruger PC-9 carbine was worse, it has a very heavy bolt, and felt recoil is very high for a 9mm.