Also, can I add the notables tag or does this come from a project (and if yes what project?).
The answer to this part of your question is - yes, you can add the sticker (but don't this time, because I just did), and do not need to belong to the Notables Project to do so. So long as the person qualifies, the sticker can be added. If there is doubt about qualification, a post to g2g from the profile will garner feedback regards eligibility or not.
I could not find any Civil Rights related notables sticker category, so I used Alabama as the qualifier.
There are probably categories that could be added for him, but I'm not terribly up on the US categories.
As he was designated a martyr, there may be something for that - I'll try looking for what exists.
Perhaps, too, if you edit the question and add the tag united_states (don't forget the underscore) it might get someone better able to advise you. Maybe also episcopal.
ETA -- I added what categories I could think of, based on the biography. There may be others, or there may be some more appropriate than the ones I added that can replace what I added.