@contararWhile the Music and Art in Ryan Sylander and Aroslav's stories are central themes, skimming over those parts won't destroy the stories; you'll be missing out on some of what I really enjoyed, since I _am_ into Music and Art, and there _is_ story development and character development in those sections, which is why I said "skim" rather than "skip".
Have you read Living Next Door to Heaven by aroslav
I haven't actually read all that many of his works, just enought to know that he's consistent. He doesn't include any of the things you've listed as squicks. He's really into the idea of people forming healthy committed, yet somewhat unconventional [polyamourous], relationships. So no cheating, swinging, hookups, etc. Looking through the story descriptions again, Art shows up a lot.
Looking through the other reviews by the two reviewers of Living next Door to heaven, I found another author you might find of interest. Polyamory, _long_ stories, no swinging, cheating, M/M, rape. Although I'd look over the codes; he doesn't list any of those you've warned us about, but you never know, some of the ones he lists do tend to show up as squicks [one of them _is_ one of mine, and it's in all of his stories, so it happens regularly, which is why I haven't read them]. I haven't read all of the stories he lists as favorites, but those I have I particularly enjoyed, and the others, I recognized their names as being well thought of.
https://storiesonline.net/a/Phil_Brown
Second Time Through: Series of four books (so far, he finished the fourth one three months ago). It's a do-over [OK, with that title it's somewhat obvious], but since I haven't read them I can't speak to which type of do-over, the goes back and becomes filthy rich due to future knowledge while screwing every girl he meets, or one that isn't wish fulfillment. He _does_ tag it as "some sex", so there is hope it isn't the first type, although reading the descriptions I have my fears. The scores are in the upper 8's, but there have been enough discussions of the "validity" of the scores assigned by SOL's readers that I'm not touching that one with a ten foot pole; enough to say that those who have read it and voted, liked it; it _is_ a decent number of votes, and the number of downloads are nothing to sneer at. Anyway, without having actually read any of his writing, it looks worth taking a look at; you should be able to tell pretty quickly if it will be worth your time or not, and if you _do_ like them, they have some length to them.
Hope that helps!