Well, I think everyone has traits that seem to counter each other irl. Imao, it's more about making all or at least most of the nuances/dichotomies subtle so they don't seem overly intentional or too far fetched. Like rather than a direct opposite it could sort of be a slant dichotomy, a few examples.
I have a female character who seems very token tomboy even if that's not what her character is overtly coded. She's rough with her little brother, she loves comic books and star trek and riding bikes. but she also loves the color pink and has a vintage Barbie doll whose hair she dyed pink. Pink and barbies are considered quintessentially girly interests, but dying hair, especially when the story was set in the late 2000s early 2010s was more edgy and rebellious. It's not a total 1-80 from the rest of her character but it does show nuance.
Another male character I have loves cars, motor cross and sports of all kinds but also peonies and keeping a very clean, pretty, and pristine house. It feels natural to his character though because we already know his mom is similar. Loving pretty things is normally associated with women and it's not a stretch to think that his filthy rich mom would collect expensive things like cars.
Since he was raised by a single mom, her interests naturally influenced him so it's not unusual that he loves both cars and pretty things.
I hope this helps. Sometimes all it takes to keep a dichotomy from feeling forced is some backstory and/or an extremely unspectacular/normal feeling explanation that will make audiences feel like 'yeah, that makes sense.'