Could I get a link to the permission statement for the second one, please? I've seen the RBC fandom before so I know that the author has given permission for recursive fanworks for that one.

It's a good idea to ask about these ones directly, as you have, because of the synning issue. I'll load them into the tag set myself. As a very minor FYI, if nominating in future, platonic relationships are usually nominated with a space on either side of the &, so:

Harriet Potter & Alphard Black (WHMT)

rather than

Harriet Potter&Alphard Black (WHMT)

but the disambiguation tags aka the information in brackets at the end looks good to me!