As I look back on all the handguns I have owned, revolver and auto, one stands out for me as it came "out of the box" without modification or desire to change except perhaps for personal cosmetic preferemce.
And I say this as a dedicated double action S&W revolver shooter: It's the Colt 1911.
It is the perfect fit.
For me it is very specifically a 1911 with a Hogue or Pachmayr finger groove grip. The finger grooves gives me a little extra recoil control with a little less grip texture. The little extra grip circumference is perfect for my long hands.