5. Swap the gender
This is honestly one of the easiest ones you could do. One of the first massively exciting things about Season 1 of Loki was when people found out that there were a slew of variant Lokis including old school comic Loki, kid Loki, alligator Loki (remember when we all cared about that for three seconds), and a female Loki.
Sure, technically she was supposed to be "The Enchantress" but we all ignored that because she was explained as a character who was basically Loki.
But comic fans are super used to the idea of an alternate version of a character that was born with a different gender. Heck, DC fans can tell you that one part of the multiverse is just an Earth where every single person is gender-swapped.
It genuinely wouldn't be that difficult to just pull it off where there was one Kang getting away with more stuff because most people didn't even realize some woman that was working with them, was actually Kang.