Yeah and I think they did establish canonically at some point that Aidan is the Warrior and the Summoner was the Sorcerer. I can't remember if the original game outright stated Blood Raven was the Rogue or just heavily implied it. But I think it's all safe to say.
If I remember right there was some backstory on each hero in the lead-up to the D3 launch. Maybe it was mini stories on the website. I definitely remember the D2 Sorceress dying in the Wizard's. Maybe I should try to find those again.