Who should I revisit as John?

So far I have visited all old friends (Pearson, Mary Beth, Tilly, and Rains Fall).

I've also encountered some of Arthur's friends like the fake veteran in Rhodes, Mickey in Valentine, and Charlotte.

I also went to Marko Dragic's lab and found him dead. John's response is kinda odd tho. He acted like he knows about him and the creation lol.

Also paid a visit to all of the graves of the fallen comrades.

Is there anyone else? Does anyone have the full list?

I was wondering if I can encounter Albert Mason, Chateau, and the Gray-Braithwaite couple somehow.