Dumb way to answer this, but check out some of Apple's default wallpapers, the non-dynamic ones. They're all super high quality and I love a few of them.
(Just the wallpapers it gives you the option of when you change your background/lockscreen).
My lockscreen one is of Cristiano Ronaldo and my homescreen wallpaper is of Stephen El Shaarawy, but its highly editted, got it off the internet and I doubt you support football LOL.