The 1911 can be just about whatever you want it to be. There are tons of accessories by dozens of makers.

I will suggest that you resist the urge to just add on stuff because you think its cool. Figure out what you need to make the gun work best for you and don't do anything else.
In my case, I know exactly what I want to change in a new 1911. YMMV
A Wilson long trigger. I have used others, but generally go with Wilson.
I'm just fine with a standard grip safety. But if I get the urge, I'll install a Wilson type Beavertail. Honestly, its been years since I've put one in. BTW: The Brown style grip safety doesn't work at all for me.
I'm not a big fan of extended slide releases or safety levers. A few of my guns came with them and I left them in. However, I've never added any. The standard stuff works good for me.
I like an arched mainspring housing. If the gun doesn't have one, I'll usually put in a Smith & Alexander arched, checkered MSH. I like these.
Finally, a nice set of fairly smooth wooden grip panels. I'm actually quite partial to Colt's sandblast grips. Most of my Colts wear these.
And that's it. These few little changes make a 1911 fit my hand perfectly. I don't need anything else cause it would just be wasted money and probably make the gun work worse for me.
Bear in mind this is what I like. You could be completely different.
Let me say it again. Don't add stuff just to be adding it. make only the changes that you need.