Prince of Persia trilogy could work. It's more linear than assassin's creed so it could offer a change of pace.
As others have said I would 100% recommended the Mass Effect trilogy.
I Also really enjoyed the crysis trilogy, it's like playing through a Michael Bay alien movie. The 2nd and 3rd games especially.
I'd also recommend the Arkham and Witcher trilogies. For the Witcher trilogy I'd wait till the remake of the first game comes out if you plan on playing them in order, as the first game hasn't aged particularly well.
By the time the Witcher 1 remake comes out we will also have a Witcher 4, so it won't be a trilogy anymore. That being said, I'm hoping both entries turn out to be good, especially the W1 remake. It's a fantastic game that's really hard to recommend for newcomers to the series.
A gaming community free from the hype and oversaturation of current releases, catering to gamers who wait at least 12 months after release to play a game. Whether it's price, waiting for bugs/issues to be patched, DLC to be released, don't meet the system requirements, or just haven't had the time to keep up with the latest releases.
^(placeholder)^