We're not forgetting anyone. All your points if they are relevant at all, are only relevant on the Dylan route, and only if Sophia makes certain decisions. All three are completely irrelevant to the Ellie and Sam routes.
Take Emma as an example. I had high hopes for her on the lesbian route, as that was where it looked like it was headed. At the time she may have gotten further with Sophia than even Dylan. But then L&P threw us a curveball, and she ended up on the Dylan route. Replayed the game, turns out at the moment she's completely insignificant for the routes I play.
So I dropped her from my interests, and have moved on (at the moment to Nathalie). I recommend you try different permutations for the Dylan route, and actually see how relevant those characters are. From the walkthrough, the only one I can tell is Aiden, since a few characters (like Alyssa and Emma), require you to accept his deal.