I'm gonna try and keep this list to MCs who actually use their magic, and it isn't just a one off thing to make them look cool, extra points if the MC is learning magic and in a magic department in their academy/school or if they work as a mage. This will also include MCs who use some form of magic that isn't "classified" as magic (spirits, divine power, etc). This is also ranked in how often they use their magic (with a little bit of bias)
Some titles I chose not to include and my reasons will be stated below.
"Can we become family": Although MC does have the power to copy others magic, she uses it about 4 times during the 1st & 2nd Season.
"Gimme That Pacificer!" MC does use magic, but she is infantilized so much that she basically never uses it, It had it's chances with the 1st & 2nd season to prove that she would actually put it to good use but it's really just another childcare manhwa, not good nor terrible.