Any good summer ripening varieties?

[Keen]

Is there any good citrus varieties that you know of that ripen in the summer? I'm trying to plan out multigraft citrus tree for my backyard. Right now it's a dwarf Valencia orange but I want to graft on Cara Cara, and Shiranui Mandarin. I'm trying to find a good summer variety , please help. I like sweeter citruses if that helps narrow it down. Thanks!

[Millet]

You already have a good late maturing variety with Valencia.