Avengers and World. You get the full story without sifting through cameos. Look up his appearances in both if need be.
You really should read Avengers and New Avengers (no Hype) together though. Pretty impressive storytelling compared to anything Marvel's released since then. If you haven't read them, I can't advocate reading the story for Hype appearances.
IMHO, Gladiator. They both have their share of space cheese feats but Gladiator has actually gone up and done well against legit high heralds. He wins it via experience.
Pretty close fight, but Gladiator edges him out due to skill. It would be a stalemate if Hyperion possessed Gladiator's level of skill. Blue Marvel curbs them both. Yep had to throw that in there.