But does Alucard's dogs get affected by Respira? if not... he eats Barragan.
The only character I can think of that has more souls is Father lol
Happy will defeat Acnologia :P
Dante would be a top HST level
Jake would be low HST because of lacky durability and gets tired quick but has good powers.
Master Chief street level
Discord I have no clue
Slender man I have no clue neither.
Mario would be in top HST due to hax abilities
This is my opinion so I could be totally wrong.