Harry Evans-Snape would be an absolute terror. Either that or every teachers perfect student (although he could use a little less attitude). However, I think he would have been friends with Neville since they were children, which would have meant that Neville wasn't as terrified of Snape and did better at potions. I think Harry would still be part of the Golden Trio since he would have been friends with Nev. If he was a Ravenclaw, I believe he would have befriended Hermione (who is a Claw in that verse) and that would be the Golden Trio. Of course, they wouldn't be as hot headed and they would actually think things through. Or, you know, they would talk to an adult when they thought something was up.

Lena/Gryffindor/9