This might be a bit of shameless self promotion but in the coming weeks the first album of my new Dungeon Chiptune project Necromancer Tower will be released by Gentle Impaler Recordings ( gentleimpaler.bandcamp.com ). The music is composed for the NES (using the MMC5 chip, that adds two more channels). Unfortunately I can't share the music yet but I think this could eventually fit your taste. Maybe you wanna keep an eye open. ;-)
P.S.: The Golden Axe games are great! Some of my favourite Beat-em-ups.