Who do you think is strong among the characters I currently have?

I only have 5 characters right now: Knight, Brawler, Executioner, Mage, and Soul Eater... I think most of them are strong if maxed out, but I personally find the Knight, Mage, and Soul Eater to be the strongest. They're all pretty good in terms of damage, stability, and ease of use. However, I personally think the Mage is the strongest. While the Soul Eater with its invincibility is also strong, considering the downside of not being able to use skills, I believe the Mage, with its versatility across various builds and decent damage, is the best. What do you all think? Please tell me your recommended characters or characters you think are strong!