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Is board 1 Low Telecom? I believe that 2, 3, and 4 are considered clean GFC but wanted to check before mixing them in with others.

Board 1 should be high telco, don't see any real junk, nice flat board (tall stuff is usually junk). nice chip density with a lot of mlcc as well. gold ground plane always helps. I am assuming that the connectors are gold plate connectors. I would pop off the few little metal risers just to be nice.
Board 2 probably gold finger card. no junk and a reasonable length of fingers, that I think just looks short due to length of board.
last two GFC as long as the connector sockets are gold plated. In your case they basically have to be as they are ram slots.

Thanks I wasn't sure but that does make sense, it's a good quality board and the connectors are gold. The boxes for the connectors at the back were throwing me off. I agree with the GFCs as well, the ram cards are better quality than the backplane style expansion cards which also count as GFC with gold plated slots and fingers.

Don't forget there are 3 conditions provided by Boardsort on when Backplane can be GFC. Gold in the sockets is just one of those.

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My grades are my own opinion and not an official grade from Boardsort