In my opinion, these should be able to pick up Mjolnir
Hercules: He's got a warrior's spirit which Asgardians (and Odin) hold highly. Although he's a bit of a goof most times, he's still honourable and a son of Zeus
Gladiator: He's the champion of an entire race and Praetor of the Shi Ar Imperial Guard. Similar to Hercules, he's got a warrior's spirit although he's arrogant at times, Thor isn't the model for humility either.
Protectors of the Universe: Quasar and Captain Mar-Vell, just by their designated office as Protectors of the Universe should be able to lift Mjolnir. Both are experienced fighters, honourable, answer to a cosmic being and have sacrificed themselves to save the universe.
Blackbolt: He's supposedly the "perfect" (in)human, moreso than Captain America. He's the monarch of an entire species, powerful, heroic and near flawless (according to Karnak)
These are the people who i think should be able to lift it:
Wonder Man: he sacrificed his life in his very first appearance to save the Avengers, thats gotta be worth something.
Hercules: when it comes to honor and pride, not many people match up with Thor, but Hercules does.
The Thing: he also has given his life to save his friends, specifically in the Authoritave Action story arc which proves he is worthy, plus he is a very honorably fighter, such as when he fought the Champion.
Captain Marvel (DC): very honorable, such as when Superman was possessed by Eclipso and CM couldve killed him but refused to because he said it was wrong. Also, read the end of Kingdom Come.
Captain Mar-Vell: probly the most honorably character ever in comics for many reasons which im not gonna get into for many reasons.
Gladiator: maybe he could, maybe he couldnt, that would be something i would like to see.
People who have: Beta Ray Bill, Thunderstrike, Superman, Wonder Woman, Odin. All these guys do deserve to lift it, but they already have done so in comics so i dont need to list why.
Captain America: like Captain Mar-Vell, Cap is just one of those heroes that you always have a good feeling about.
Hawkeye: sacrificed himself in Avengers Disassembled and has been very honorably throughout his entire history. Was also the founder of the reformed bad guys team, the Thunderbolts.
Atlas: has reformed his ways from being a villain and is now very honorably, willing to sacrifice himself if need be to save innocent lives.