Bit in all seriousness, there is no contest ALL BnHA girls are great : yes:
Of course.
Ochako is best girl #1 because of her warm personality and wants to save her family's financial problems.
Tsuyu is best girl #2, well, she's super friendly not to mention best in emotional support.
Momo is best girl #3: rich, smart, sexy. Cool quirk.
Kyouka is best girl #4: love of music and some sass(?)
Mina is best girl #5: super friendly and a dancer!
Tooru is best girl #6: genki girl but she needs to be in the limelight for a moment. Need to know what is her eye and hair colors, hairstyle, etc. Plus will she become the next Susan Storm-type character?
Kendou is best girl #7: she should've been added to Class 1-A because there are too many guys in the class.
... yeah all the females are best girls!