Hajime Hinata for High 7-C for the following reasons:
The man has a fairly high scaling in the tier (as he's stronger than someone who can KO a character who is 173.94 Kilotons with just barely hitting them with a finger), and has a lot of hax, such as:
- A real damn strong Social Influencing and Madness Manip which makes him able to basically Talk no Justsu with few words, and can either make the opponent side him or straight up suidice.
- Madness Hax from singing as well
- Passive Luck Manipulation which is basically Probability Manipulation in disguise. His luck is stronger than both Nagito Komaeda's and Makoto Naegi's. The former can passively manipulate the events to go exactly like he wants to even if unaware, allowing literal bullshit like:
- Him bending down to the ground to take a soda from a machine, and without realizing it a truck hits that machine, avoiding Nagito in time just because he bended down, and Nagito got all the sodas for free, all of that without realizing it.
- As a baby he not only was involved in a plane crash, but was the only survivor as well.
- Found a winning lottery ticket in a trash can.
- Planned a suicide plan which is based on just his luck, with said plan being people throwing at him bottles of water to attempt to "save" him from a fire he purposely set himself in, with one of those bottles containing a poisonous gas. Nagito used his luck to make sure the traitor of the group would be the one throwing the poisoned bottle, despite none of them, not even Nagito himself, could know who throwed the poisoned bottle at the time. After another research (which mind you, Nagito was dead already given that he was poisoned), it was indeed confirmed that the traitor was the one who threw the poisoned bottle, meaning that his luck works even after his death.
- From throwing a ball in a building, that ball hit exactly all the weak spots of the building, making it collapse on Nagito, and yet all the pieces missed him.
- Makoto's luck instead is much simplier and is more a Plot Armor, which allows him to achieve basically miracles such as being saved from an external source right a second he was about to die or being chosen between all the students in Japan despite being simply a regular boy otherwise. And Hajime has both.
- Nigh-Passive Information Analysis, as he's superior to Junko who can get all the information, thoughts, and history on what she's watching from just a glance and can accurately predict the future thanks to said analysis.
- Instictive Reactions from being superior to Mukuro in her Battle Trance Mode who can dodge an explosion before she knew it was coming, or even use basically Ultra Instinct, with her senses being one with the battlefield, allowing her to perceive stuff her eyes wouldn't normally due to the position, making her go unscratched from every fight, no matter how many enemies are. It was worked despite tens of Monokumas surrounded her and spammed attacks against her, and even in her normal state she has was never wounded in a war despite being involved in many of those.
About the the list, I am pretty sure he'd have no problems in dealing with Gentle Criminal and Brunhild, given they're basically haxless.