Fullmetal Alchemist, Shaman King Recommendations
Both are shonen adventure manga that have a similar pattern of being incredibly funny, even during life threatening situations. Anyone who liked the quirky, involving and epic but still hilarious, even darkly hilarious at times, storyline of either would probably like both.
They are both supernatural, and have non-racist heroes in a judgmental and often murderous world.
both main characters have their goal, they're both so young, and in general this two stories have in them something more, it's not just action