I've never read hell's paradise but here's most of the action/shounen manga I really liked:
http://www.mangago.me/read-manga/kemono_jihen/
http://www.mangago.me/read-manga/owari_no_seraph/
http://www.mangago.me/read-manga/neon_genesis_evangelion/
http://www.mangago.me/read-manga/jujutsu_kaisen/
http://www.mangago.me/read-manga/soul_eater/
http://w......
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