I found Friz Quadrata which is what was used for BlackFlag, and I really like it, but it is already being used by the company Anti Social Social Club, and don't want to look like it was completely copied.
Are there any other fonts you can recommend that have this appeal to them?
Dragon Serial https://www.myfonts.com/fonts/softmaker/dragon-serial/heavy/ is a nice looking flair serif that I think would work with some tweaking.
Possibly try Cinzel bold, or black? A little sharper than Friz Quadrata, but you can go in with illustrator and alter the letterforms as you like.
