Finding the best profile background for my theme

[▯▯ ▯ ▯]

My theme on Steam revolves around Xayah from League of Legends. I am aware that nothing on my profile really lines up with one another and nothing is perfect, but I am wondering if anyone can find some good backgrounds that would look really good with this kind of theme, along with any tips for improving the profile.

I am still in the process of leveling my account, but I am wanting my profile to be super good like the profile shown here (yes, the time stamp was intentional).