To make things clear:
The variations of each class have something to set them apart from their base counterpart other than colour. These classes are exclusively from the Wikidot. And yes, I know I missed the Fun variation of Class 5. I couldn't find an available screenshot since Level Fun was removed from the Wikidot. The next video will be about Level 2 endings. This video took a lot of time so the next maybe be postponed.

Timestamps:
0:00 Classes 0-5
2:32 Common Classes
3:22 Eyes of Argos
3:37 Greek Alphabet
4:12 Rare Classes
5:27 Glitched
5:37 One of a kind
6:02 The one and only.

Songs used:
The Caretaker - All You Are Going To Want To Do Is Get Back There
The True Backrooms Soundtrack - A Million Hours, A Million Days

If you have any questions, feel free to leave a comment.