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Okay, so I was trying to hit both the "absurd" part of the prompt and what I think of in terms of the vibes of the movies you listed. I reverse-sorted my rated movies on IMDb to try to get lesser-seen films. For each one, I'll tell you my thinking, because it was always some mix of the plot element and the vibes:
Love, Concord: It's been a while since I watched this film, and I remember it being an oddball, very likable romantic comedy.
The Nine Lives of Tomas Katz: This movie is weird, and to me it hits both the absurd part and the odd vibes
*Computer Chess: An off-kilter sci-fi comedy.
Kitchen Stories: This is a vibes recommendation. A man is assigned to observe someone as part of a study, and sits in this high chair in the man's kitchen.
Die, Mommie, Die!: This is another vibes recommendation, though the plot is absurd. It's sort of a parody of melodrama films, with a ridiculous number of twists.
*Next Stop Wonderland: You've seen Happy Accidents, and this is its low-key, not sci-fi cousin.
Brother from Another Planet: Again: vibes. But also that sci-fi/comedy/drama intersection. There's a standout sequence with Joe Morton's character watching a young woman play an arcade game.
*Beyond the Infinite Two Minutes: Sort of like Palm Springs in the way that it puts the emphasis on the "rules" of the sci-fi, but it's also just very funny.
*I'm a Cyborg, but That's Okay: This is the Safety Not Guaranteed cousin on my list.
A bit darker:
Brothers' Nest: This isn't absurd, but it's darkly funny.
Crush the Skull: This is admittedly more of a comedy-horror, but, I don't know, maybe a bit a la Shaun of the Dead?
*Brand Upon the Brain: I don't know if you've seen much from Guy Maddin, but this is maybe a bit akin to Wristcutters? I don't know---Maddin's work is really its own thing.
The Wild Boys: This is a very weird movie, vibes!
*The Beta Test: This one and Wolf of Snow Hollow, and I think both are dark comedies with some of that absurd/awkward energy you get in some of the films you listed.
*The Kid Detective: I can't quite explain why I put this one here. It's a bit melancholy and emotional. It just felt right!
The One I Love: Again, the vibes!
I've gone through and put a star next to the ones I think best fit what you're looking for.
It's a bit tricky. I tried to identify movies that fit the "absurd fiction" piece, and that made me feel the way that the ones you listed also made me feel. The first part of this was easy, and the second part was hard. If I had to pick just one: Beyond the Infinite Two Minutes.