Who actually lives in the Far Realm?

Ok. So the Far Realm is supposed to be this place of fathomless madness, right? But what sort of creatures actually live there? Can I find illithids wandering around, or even stranger creatures? Grell? Aboleths? If I could avoid insanity and went on a non-Euclidean stroll through the Far Realm, who would I run into? What terrain would I expect to see? Since WotC irritatingly (but wisely) decides to withhold as much info on the Far Realm as possible, I'm open to all manner of speculation.

Well, there's two answers. First, I think the Far Realm is just so alien that our minds would not even be able to process anything we saw or experienced there, because there simply is no common frame of reference for our senses to grasp. It's like asking what the 9th Dimension is like, or what's it like inside a black hole. (Spoiler Alert: It's dark). It's like a half-remembered dream, viewed through a kaleidoscope, while still hungover. And if you were to somehow recompile that dream into a visible image, your mind would cave in and your heart would explode inside your chest. It's more than just chaos, it's chaos folded back in upon itself. A tesseract of entropy. 

Secondly, flumphs. That's right. The Far Realm is secretly run by a Flumph Mafia. Prove me wrong!

My players ima  campaign once decided to use the blood of 13 different abberations to create a “Potion of Far Realm Wandering”

I, of course, allowed this. Most of the creatures there were weird hybrids of Mind Flayer + Beholder (not a mindwitness) and Flumph + Grell and stuff like that.

Think of the terrain as being both hot and cold, dry and wet, acidic and basic, all at once. It messes with your internal chemistry on contact.

The air is safe and poisonous, the water is liquid and solid and gaseous all at once. Gravity? Pulls you and pushes you in every direction, leading to your body warping in nonpainful ways.

so yeah, that’s the Far Realm in my eyes.

You could have a look at the Kaorti (link to wiki here: https://forgottenrealms.fandom.com/wiki/Kaorti). They've not been mentioned in 5e lore as far as I am aware but they have some lore form previous editions that is kind of interesting.

you can find Jeff the Evil Roomba there i think

Quote from SoulSealedSulfur >>

you can find Jeff the Evil Roomba there i think

 also for my world, the Far Realm eqrivalint(AKA everything beyond the gient corpse(of a true gient) that makes up the world) is more or less just everything arould the world i dont think i well develup it must beyonde that lol

The Far Realm is supposedly the realm of aberrations, lightless beings from beyond the stars. It is unfathomable. I imagine that it is a drifting void of chunks of whatever floating around and colossal entities the size of galaxies drift, plotting universal domination or whatever. But again, it is unfathomable, so I can't actually fathom what it would be like.

Quote from AnzioFaro >>

Secondly, flumphs. That's right. The Far Realm is secretly run by a Flumph Mafia. Prove me wrong!

 Well, I can't. But I also can't prove you right.

Quote from WolfeCriedPup >>

Quote from AnzioFaro >>

Secondly, flumphs. That's right. The Far Realm is secretly run by a Flumph Mafia. Prove me wrong!

 Well, I can't. But I also can't prove you right.

 Hey, Russell's Teapot.