The 1911 style in steel ,Colt or Iver Johnson Pony( both by FIE) or the little Llama seem to me the softest recoiling.
That Llama .380 is the closest .380 to a 1911 ever made, but has a bad reputation. I own several, some as old as 1943, and really like them.
Also, the Star S model, though slightly larger, is also locked breech (Some later Llama's, and some very early ones I believe, were blowback), and the internal design of the Colt SA Pony and the IJ, as well as the Mustangs, Gov't .380, and P238 all owe their internal design to the Star, which I think owes
it's design philosophy to the WW1 Ruby as made by the predecessor to Star.
I'm a little foggy on that Ruby part, would need to dig out the books. Most Ruby's were of even simpler design and made by some huge number of small shops, who knows what they have in their guts.
The Llama's and Star's are very nice shooting guns that are, sadly, often forgotten in these discussions.
My 1943 Llama next to a modern RIA 1911 type;
One of my Star S (Or SS) models;