Alright, there are currently three people who I think have a possibility of beating oromagi.
Maybe Sum1Hugme, but that's not for sure.
If intelligence keeps on farming debates, he might overtake oromagi. However, this isn't for certain as he just got his ass handed to him by seldiora who he usually farms. This means he loses his main source of wins, if Mall decides to leave.
Bearman is currently the only active player with a undefeated win streak of over 10 (besides oro), if he keeps continuing he will eventually surpass oro. This is because he's doing debates faster than oromagi, and people are willing to accept his challenges due to his status being relatively unknown.
Sum is the same thing as bear, but he/she has less wins.
Rational is rational.