Is there a site where I could look at the different Npc classes, as Oblivion had the UESP side? As I want to know more about the followers I can get

UESP.net is for ALL of the Elder Scrolls games. It hasn't been fully updated yet, but I'm sure most of the classes for companions are up.

UESP hasn't got the Npc classes yet, so if there was another site I could see it would be great