I'm currently making a mind map of the Harry Potter universe, but when I got to filling in the houses of Hogwarts, I realised that I barely know any names.
What are the names of everyone from Harry's year?
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If it's just Harry's year you want, JKR had a list of forty students ready when she started writing the books, called "The Original Forty".
Also see this answer that tells you what happened to those original forty.
Wizarding World also has lists of characters, organised by house. For instance, the Ravenclaws. If you set out and explore Wizarding World, I think most of your question will be answered there.