The Man of Steele and from Krypton. The most famous super hero out of everyone of course is going to be # 1 on this list. He definitely deserves this rank. I love what Paul Dini did with him in all the animated series making him vulnerable to regular things like all the other super heroes. In the original comics he was able to lift planets. I don't think he should've been able to do that. Well most definitely the number 1 alien hero.
2. Martian Manhunter
He definitely is an alien. I like Jon because he looks like what we all expect a martian from Mars to look like. Also he's from Mars. He is a shape shifter. His weakness is fire, which is weird because you'd think he'd be vulnerable to lasers and things like that. Jon Jonzz definitely deserves 2nd place.
Shiera Hol is destined to be with Carter Hol. Shiera is a detective from Thanegar and was beamed into Earth with her prophecised lover Hawkman. She is a warrior not to be messed with. In my opinion she surpasses Hawkman because she's more intellegent and has more heart. She does wonders with her Nth metal mace and any other weaponry. Unfortunately Thanegar gets a bad name from that invasion, but it doesn't change my opinion of Hawkwoman.
The male opposite of Shiera from Thanegar. Carter is almost exactly the same as Shiera but better in combat and weaponry.
Kara Zor-el is Superman's biological cousin from Krypton. Kara can basically do what Superman can do except with grace, style, and beauty. She may look like your average valley girl but she is one alien not to be messed with.
6. Power Girl
Power Girl is the Earth-Two counterpart of Supergirl and the first cousin of Kal-L, Superman of the pre-Crisis Earth-Two. The infant Power Girl's parents enabled her to escape the destruction of Krypton. Although she left the planet at the same time that Superman did, her ship took much longer to reach Earth-Two. She is the equivalent of Supergirl.
7. Red Tornado
Red Tornado is an android super hero. When he entered the Justice League the rest of the members questioned his membership, but ended up keeping him. He can create tornados and fly with red.
Originally conceived as a human clone genetically engineered to look like Superman with simulated powers, he was retconned to being a binary clone of Superman and his arch nemesis Lex Luthor, making him a hybrid human/Kryptonian. He's exactly like Superman just shorter.
Starfire is the princess of Tamaran. She's a member of the Teen Titans and almost got married to Nightwing. She can absorb radiation and has superhuman strength.
A character with a morbid past and origins, Raven is the half-breed daughter of a human mother named Arella and the interdimensional demon Trigon. She grew up in an alternate dimension called Azarath, with pacifistic inhabitants whose spiritual leader was the mystic Azar. In her homeland, she was taught to "control her emotions" by Azar, in order to suppress her inherited demonic powers. Essentially, it was feared that if Raven was allowed to feel any strong emotion, she could become a demon like her father.
11. Shadow Lass
Her real name is Tasmia Mallor and her homeworld is Talok VIII. She has the power to project darkness. Like all Talokians native to Talok VIII, she has dark blue skin and pointed ears. The Talokians of Talok III such as Mikaal Tomas have light blue skin. She and her cousin Grev (Shadow Kid) received their powers from their ancestors, whose spirits reside in a cave on Talok VIII
Kilowog is a green lantern from Bolovax Vik. He mentored most of the Green Lanterns.