Which ring bearer would be THE most powerful individual?
Juggernaut w/yellow ring- Juggernaut by his on power inspires fear and enjoys doing so. He's also had the experience of being possessed by Kuurth and proved to be the most successful of the Worthy. Ther ring should take to him just as well as he takes to the ring. Juggernaut is already unstoppable. Add elements like flight and blugeoning constructs and you have the ultimate bully.
Thanos w/black ring- What better wielder of the black ring than the death bringer himself? It's scary to think what he could do with such power. This could be his way of finally bonding with death.
Annihilus w/orange ring- Think about this one. Annhilus is paranoid to the point where he believes all other forms of life are a threat to his own. When Thanos read Annihilus's mind and discovered that his ultimate goal was to rule over the void, even he was shook up! That's some sick chit. The orange ring would take well to the character with the most selfish intentions ever imagined.
Superman w/green ring- Great willpower combined with a great body make this match work well.
Adam Warlock w/white ring- Know why Adam Warlock keeps coming back from death? It's because his life force is so strong, it never dies and eventually makes a new body for itself. Perfect match for a ring that is connected to the powers of life and creation. Also, Adam has the smarts, experience and cosmic awareness to utilize the ring to it's fullest potential.
Green Scar Hulk w/red ring- The king of rage in his most effective incarnation, where his rage and anger is channelled. Like he would need any more power.
Who would be THE most powerful individual? Also, who would win a match between the first three and the last three? I know, impossible to answer!