OMG i love all your ideas! I also think he would move to Chelsea as a top flight option, but - and this depends on what we see in 3.11 in a BIG way, I may change my mind next week - I personally would actually love him to go back to City. Jamie would have been a Man City fan, and scouted by them, way before he even knew his dad. They were his first (there is an amazing fic that gets into these feelings if you're keen - https://archiveofourown.org/works/45790894/chapters/115233907 ) and if City is in his blood, he could never ever do Man United in my personal opinion. He would be publically abused by fans forever and ever and ever for it, and he in his heart I don't think could do it. I've actually really enjoyed the way that the show has shown him to not actually be triggered by City, like, the issue is his dad, not the club, he shows appreciation for the club and for Pep and it would be a childhood love. If he managed to get rid of his dad once and for all, I can see him claiming City as his own once more. But this upcoming episode may totally change how that's presented by the show. But I think Chelsea is one of the most perfect options and I love the idea of Roy returning there too.
I can't believe they didn't even give Roy's sister a first name on screen! Quite insulting. But I agree about Ruth and I've seen a few fics that use it, it's my favourite option for her name.
Also, I've read another fic where he goes to PSG! (https://archiveofourown.org/works/40234527 )
Hehe, glad you liked them, Nonners !
I think City would be an option also, I just tend to be a little fixated on the fact that he was obviously not happy there when he was young and I think a lot of it has to do with his dad. I guess it really depends on how much he repressed his trauma and whether or not he manages to untangle Tartt Sr from City (though I will say so far canon leans into 'he's okay with City' territory indeed^^)
Like you said though, we still have two episodes to see where they take Jamie and whether we want to ignore it or not :P
Thanks for the fic recs, too, turns out they were the sources of my headcanons, so it's nice to see we share some favorites :D
(I did mainly latch onto the PSG idea because of the potential for multilingual insult trading, especially with Dani and Spanish. I just fucking love this trope.)
Also re: the City/United rivalry... yeah, I neglected to think of that xD I should have guessed tbh, two major clubs in one city is unlikely to result in friendship xD (And also I know enough of football to assume it would be quite difficult to go from PSG to L'OM so I can imagine the sort of treatmant Jamie would get :P)