Douglas Reynholm tried to roofie Jen

Jenna & Frank hooked up that one time though

Facts lmao

Maybe a group of aces?

Good one, I hadn't thought of that

Dee and Charlie bang.

Mac bangs Dee and Dennis' mom.

Frank bangs Charlie's mom (a lot).

Frank, Charlie, and Dennis all bang the waitress.

Dennis tries to bang Mac's mom.

Frank and Mac both try to bang Dee and Dennis' Aunt Donna.

I think Frank bangs Dee and Dennis' cousin Gail the Snail

But all of these are one off bits rather than being part of a larger arc or plotline, so I think it still fits the spirit of the question.

Mac is gay for Dennis, and Charlie and Dee had a fling in The Gang Misses the Boat

Tricky – because they’re entangled off set(?)

Love the show, but Dee and Charlie hook up in 'The Gang Misses The Boat'. She also admits to SAing him later in 'Time's Up For The Gang'

Very subjective. In my opinion introducing romantic subplots is the laziest of writing.

George Michael and maybe is a pretty big plot point 😂

I can't comment on Arrested Development cause I've never seen it, but Golden Girls are all women not a mixed-gender group

Hadn't thought of that one. It's a bit hard to decide if they should be considered coworkers or a family. I guess it technically counts cause they're a gender mixed group not actually related by blood. One of them is a kid but is actually the oldest. Although I'm not sure the aliens really had gender in the way humans do

Margaret and Frank were a couple and she hooked up with Hawkeye at one point

Harry and D'Arcy dated for a few episodes (maybe only one or two, I don't recall clearly). There was a bit of teasing that Asta and Harry would be a thing at some point but thankfully that never materialized.

There were definitely romantic relationships with side characters - Sheriff Mike had a couple, obviously the mayor and his wife, Harry and the bird lady, Liz had a boyfriend (though he rarely appeared or was even mentioned), plus D'Arcy tried a few times to find love and Judy... had several flings?

The original Power Rangers were teenagers. And I thought Jason and Kimberly were a couple but I don't know, the only season I really watched was RPM, which has a romance between Dillon and Summer

The British one would qualify as one with no romantic entaglements (if you don't count the living couple) but the American one has several couples in the core group Thor/Flower, Trevor/Hetty, Pete/Alberta

Fred and Daphne are a couple I’m pretty sure