Wonder- R.J. Palicio, 10 all the way around 

The War That Saved My Life-Kimberley Brubaker Bradley, Double 10. Make that TRIPLE!! 

The War I Finally Won aka SEQUEL to WTSML, TRIPLE TEN!!! 

We are all Made of Molecules 11/10 Susin Nielsen- AMAZING

A few excellent books popped into my head from your description of what you said you like, so here they are.

In Other Lands by Sarah Rees-Brennan.

This book seems like your typical fantasy book at first, but it actually turns a lot of tropes on their heads and provides a meaningful, thought-provoking commentary on real social issues like sexism and homophobia. There are LGBTQ+ characters, a good amount of romance, and lots of witty banter. I’ll give it an 8.5 since, though I really loved it, the first quarter or so is pretty boring.

(Note: whether or not you’ll like this book is kind of a toss-up depending on your personality and stuff. Some people can’t stand the main character, who is quite often a selfish, snarky jerk, but I adored him, mostly because I could relate to him a lot... which now that I think about it is probably a bad sign.)

Literally Anything by Leigh Bardugo 

First of all, Leigh is an absolute QUEEN and actual goals, in writing, life, and general awesomeness. She’s written the Grisha Trilogy and the Six of Crows Duology, all of which are incredible. There’s romance, action, strong female characters, lots of diversity, awesome villains, and the love of my life and biggest fictional crush: Nikolai Lantsov. *swoons* 

I’d recommend reading the Grisha Trilogy first, which I did not do. It works to read SoC first, but it spoils a wee bit of GT stuff and you won’t have the enjoyment and cackling excitedly at the cameos and references.

Overall, the Grisha Trilogy gets a 9 from me. Two points were taken off for Mal and one was regained because Nikolai. The SoC duology is a very solid 11. I personally like it more, but you should definitely read both.