To some extent, it'll rely on the anatomy of your hands/fingers. But there's a bigger picture. No-one is going to play just one chord in isolation in the middle of a piece. Imaging your CEG (Cmaj) chord is followed by an F chord. You may want to keep the C at the bottom, and play the F and A instead of E and G. With thumb on the common note C, it's simple to change. Or, maybe there's Gmaj. next. Now, you could leave your ring finger on G, and move the C and E down to B and D. Possibly easier with pinky on G?
As a bottom line, it's pretty important to be as good with every digit, so relying on 2 3 and 4 cuts your army down to 60%. Not a good reduction! You need as a piano player, to find your own fingerings for everything you do. True, lots of sheets have suggested fingerings, some may or may not be best for you, or another player. But, part of the fun and planning towards being a good player is to examine your own fingering for whatever you do - critically. And get all those digits working for you.
I have a student with incredibly long fingers, who plays just about everything in a way that I think wouldn't work, but it does for him, so it's unproductive to keep saying "but the book says do it this way".
You will also find that there will be at least a couple of different fingerings for chords (the same chords exactly) that you eventually use, depending on where you've come from and where you're going. Open mind !