Puella Magi has 4 characters that reach 2-A:
Madoka Kaname,
Homura Akemi,
Kriemhild Gretche who's basically Madoka, and
Avatar of Calamity, as well as a character reaching High 3-A:
Tart. Everyone else is at best 5-B.
In Sailor Moon, nearly every single main Sailor (except ChibiUsa),
Tuxedo Mask,
Sailor Cosmos, and
Sailor Galaxia reach Low 2-C, while all the remaining side-Sailors,
Queen Serenity,
Sailor Kakyuu and others reach High 3-A.
Usagi and
Chaos reach 2-C. Even some "weaker" characters are Stellar Tier.
The
Yunaverse is weaker, with only three characters reaching 3-A:
Yuna Yuki,
Shinju and the Heavenly Gods who don't have a profile yet. The rest of the cast is 5-C at max.
The
Symphoverse reach High 4-C at maximum potential.
The Nanohaverse is currently being revised by some members. I've watched up to the beginning of the 3rd season, so there's maybe some further developments in the power levels, but it doesn't seem that they will go past Tier 5.
Pretty Cure reaches 5-A at most.
Magical Girl Raising Project varier from Tier 8 to Tier 7, but has
Keek with 3-A, and
Nemuri with Low 2-C, with many more characters to come.
Magical Girl of The End varies from Tier 9 to Tier 7, but
the main antagonist can possibly reach 2-B.
Magical Girl Spec-Ops Asuka is Tier 8.
Magical Girl Site is Tier 9.
Cardcaptor Sakura surprisingly doesn't have a page on the site.