When it comes to phone wallpapers, I prefer darker backgrounds. One reason is so my phone doesn’t become a second Sun when I am sitting in the dark with our kids, putting them to sleep. Another reason is that I want to minimise clashes with app icons and on-screen text so I can see what I’m doing.
I did a couple Google searches and came up with this great wallpaper that I love. I searched for it on my desktop and found a version on the Mobile Abyss site. It looks terrific on my phone.
Another option is this version on the same site. It has a bigger badge but a very different look. I haven’t tried it yet but it could look great on your device.