For me its the Browning Hi Power. I love the 1911 and classic P series Sigs like the P228 as well but nothing fits me like the Browning Hi Power.

P320 and Staccato XC/C2

Sig P228 and HK VP9

With the P210, I don't even need to try.

CZ 75's

GEN 3 Glock 21 followed by GEN 3 34.

1911 and ruger mk series 22s

P7psp or my Dan Wesson CBOB.

P220 and G30S

In a SD caliber...
1. 1911
2. HK P7M8
3. CZ Shadow 2
4. Sig P229 Legion
5. Sig P225

Depends what you mean by "best" of course, but for me the P228 for single-shot accuracy and the odd quality I'll call "pointability", and the P229-9mm for rapid-fire (the heavier slide put me on target slightly faster for follow-up shots).

My issued S&W Model 19 2.5in bbl, an now my Sig P226S 9mm.

Beretta 92 with a 14 lb hammer spring, LTT Optimized Trigger Bar, 92X Performance semi-flat shaped trigger, G kit.

Revolvers.
S&W Model of 1955, 45 autorim. 2" groups at 50yd. Offhand.



Colt OMM 38. Silver dollar size group at 50 yds. Offhand.

The gun I shot the best was a Remington 40x on the school rifle range in 1968-71. Three years until graduation, two nights a week, over 200 afternoons shooting .22 International 3 position, prone, kneeling, standing.

About 10,000 rounds.

And we were given the beater rifles, the other high school team had 52D's. There was about a ten point spread between them and they also got to shoot three times a week, which was another advantage.

Go shoot the gun you dislike the most with what you think is the worst fit, get 10,000 rounds in it - the pros do that every year - and you might find it's less the gun and more the gunner.

Long ago when I regularly
humbled myself
shooting 2700 Bullseye Matches:
208s Hammerli (22)
MP95E Benelli (22)
S&W Model 52 (38spl wadcutters only)
Les Baer Bullseye (45 acp)

After bullseye:
SIG P210-6
SIG P210A
H&K P7M8

and of course,
various S&W revolvers

Over time, which means since some time in the very early Nineties, I have shot Ruger GP100 revolvers, the most consistently best. Specifically, the lugged-barrel version, with adjustable sights, and 4” or longer barrels. I put much diligent effort into learning to shoot S&W K- and L-Frames, during police academy training, in 1983 and 1984, and built upon that with other revolvers. The original-style Ruger factory grip feels like it was custom-made for my hands, and the trigger is perfectly located and shaped, so that it is a natural fit for my trigger fingers. I tried to learn to do as well, with other handguns, but the GP100 is my best choice.

On a good day, I can shoot a good 1911 about as well, but I am less consistent.

One upon a time, I could shoot a SIG P229 DAK about as well, on a good day, but that was before arthritis spoiled that, as a P229 has a rather high bore axis, and the semi-rounded rear portion of the grip, and other ergonomic factors, worked against me. Only my right hand has gone gimpy, but it hurts to use my right hand as the support hand, with the proper thumbs-forward hold, for recoil control, when shooting lefty, so, I only shoot the P229 on rare occasions, and not nearly as well as when I trained regularly, when it was my duty pistol, for a number of years.