Match ups

Any Kryptonian even in the toned down more modern versions of the mythos would be more powerful than She Ra overall but they are NOT immune to magic. A magic spell is the catalyst that causes the princess to become She Ra but after the transformations her powers are not magical in nature meaning she would not automatically defeat Superman or Super girl. The biggest danger for a Kryptonian is her SWORD, as it is very magical and thus could hurt them. My money is still on Superman or Super girl over either He Man or She Ra.

Wonder Woman is much less powerful than Superman and a much more even match. Modern takes on the character have her able to fly (there is too much of that I think she should not be able to fly but I dont write the comic books) and She Ra cannot actually fly just jump very high and 3 degrees of freedom is a HUGE advantage in a fight. Even if She Ra was marginally stronger and a better fighter overall (which is not a guarantee) the inability to fly would cause her to lose. You (the poster here) would probably win a fight against Mike Tyson if you could fly because you could levitate above his head and swoop down to kick him in the head then move up before he can punch you.

Powergirl has powers that rival Kryptonians and can hold her own against Super Girl so she wins too.

She Hulk would be physically stronger than Super Girl and She Ra for the same reason that the Male version of hulk is stronger than Super man, but she cannot fly and would be very vulnerable to the power sword. She Ra might be able to kill her with the sword without the sword she would lose.

Comic books, especially DC but Marvel too really overpower their characters while He man and She Ra held back a tad on that so that their heroes would have a challenge which is why the DC and Marvel rivals would win in my opinion.

Even though one of the other posters went into great detail about how Wonder Woman and Supergirl et. al would be able to defeat She-Ra thanks to their abilities to fly, I think She-Ra would be able to outwit them using her superior strategic skills.

Wonder Woman and Supergirl also have emotional and psychological insecurities that She-Ra is devoid of.

One often gets the sense that Wonder Woman and Supergirl are determined to prove that they can be as violent and "tough" as their male counterparts, whereas you NEVER get that sense with She-Ra, who is almost always self-possessed, cool, and calm. In other words, She-Ra doesn't have the same hang-ups and chips on her shoulder that most of the DC and Marvel heroines seem to have.

I also totally disagree that Supergirl is stronger than She-Ra. She-Ra isn't vulnerable to things like kryptonite. And He-Man is supposed to be "the most powerful man in the universe" - which makes him even more powerful than Superman, HA!! In like manner, She-Ra would be more powerful, physically AND mentally, than silly Supergirl.

Most SUPERHERO comic books lead readers, especially male readers, to believe that brawn overcomes everything - but that is not the case at all. That is why even villains like Catra were able to incapacitate She-Ra on occasion, when she relied on strategy over physical force. Heck, even in the DC universe, Batman has been able to more than hold his own against Superman - despite lacking ANY superhuman powers.