You believe you'll find your wings

My reasonings:

THE Perfect Roommate

Uncle Iroh, it's Iroh

Rocko, polite, well-mannered, and responsible

Leonardo, he's disciplined, responsible, a good leader but isn't afraid to join in on the fun with the others

Helpful and Fun

Grandma Gertie, she's fun, eccentric, bake and cook. As well as just randomly celebrating the wrong holidays so you'll definitely be eating good tonight

Hugh Neutron and Nigel Thornberry, they're the fun dads

April O'Neil and Sandy, they're the most responsible ones in the house

Spongebob, it's Spongebob. Depends on who you are, his antics could be the best day ever or literal Hell

Aang, he's a kid raised by monks. He's definitely the second most patient person in the house. Though occasionally rightfully calls out the others' obnoxious habits like Mr. Krab's stinginess, Ember's loud music, or Jimmy and Donnie's inventions going wrong

Good but with Flaws

Korra and Zuko, they'd be good roommates, just not the best of the best. Think of them as the gateway

Lucy Loud, like her brother, she's a good kid and arguably one of the most emotionally intelligent people in the house. Her main issue is the swarm of bats in her room as well as putting organs in the fridge. Also I have a Lucy bias

Lincoln Loud, he's a good kid, does his chores but has been a bit of a schemer from time to time

Gerald, Norbert Beaver and Danny Phantom, no notable flaws that make them bad roommates but nothing outstanding that make them good roommates either

Messy but Still Solid

Catdog, they'd be in a higher tier if it weren't for two words: Garbage Truck. Once he hears that horn, Dog would run towards the door to chase it, leaving a big mess behind (Usually it's April who cleans up the mess)

Toph, her side of the room would be covered in dirt, rocks and dust. Otherwise, she can carry her own weight and help out with the heavier chores around the house

Jenny, it gets destructive whenever she gets too emotional. Thank god, Rocko agreed to be her stress ball

Helga, she's a troubled child. But with the help of more positive adult figures like April, Hugh, Nigel and Sandy, Helga might actually get her emotional shit together

Donatello and Jimmy Neutron, their inventions constantly causes problems around the house

Powdered Toast Man, he can get careless and destructive out of sheer obliviousness

Fun but Barely Helps Around

El Tigre, he's the resident rebellious teen

Michelangelo and Rocksteady, younger brother mindset

At Least They Pay Rent

Squidward, he can get condescending towards the others but occasionally shows his more decent side

Plankton, like Mr. Krabs, he's not the best to be around. Unlike Mr. Krabs, he's actually paying rent

Shredder, though evil, Shredder has been shown in the '87 show to have SOME human decency as a roommate

Doesn't Do Crap

Daggett Beaver, he's a more tolerable version of Zim

Patrick Star, he literally won a trophy for being Bikini Bottom's laziest

Terrible Roommates

Azula, if you're not one of her friends (Like Ember or even Rocksteady) she'd belittle you for every little mistake you make. Also, she always lies

Ember Mclain, she'd be blasting that death metal music at 3AM and would not give a damn about the other's complaints

Ren and Stimpy, one is a psychopath who'd murder you in your sleep while the other is grosser than Patrick

Zim, pretty telling that apart from GIR's blind obedience, Zim doesn't actually have any genuine friends in his home series

Mr. Krabs, this is the same cheapskate who sold SpongeBob's soul for 62 cents, and you expect me to expect him to pay for rent?

Pets

Reptar, the dog

Garfield, the cat

Garbage Disposal