I finally feel confident enough in my MU experience to make a matchup chart for Lex. Remember, these are all my personal opinions and I am willing to listen to any reasoning behind disagreements you may have with my chart. I also will go in depth about my reasoning for any of these numbers if anyone wants me to clarify. I do not have enough experience with batgirl yet, so I will add her later.
Grundy 6-4
Bane 6-4 (possible 5-5)
Joker 4-6
Shazam 5-5
Sinestro 4-6
Flash 6-4
Arrow 5-5
Harley 4-6 (possible 3-7)
Lobo 6-4
Ares 5-5
Deathstroke 4-6 (possible 5-5)
Hawkgirl 6-4
Nightwing 4-6
Aquaman 4-6 (possible 5-5)
Frost 4-6 (possible 3-7)
Batman 5-5
Superman 3-7
Doomsday 5-5 (possibly 4-6)
Catwoman 5-5
Raven 3-7
Green Lantern 5-5
Wonder Woman 5-5
Cyborg 3-7
Black Adam 4-6