Looking for an updated Beezus

Hello! I've been searching for comp titles for my ms, and have just run into a real block in finding the book that establishes what kind of kid my MC starts out to be. She's practical, willing, a caretaker - she's Beezus. Should I worry that an agent I'm querying isn't familiar with Beezus? Is that too old-fashioned an example?

Thanks for any opinions!

I've been reading samples for months and can't find any comp titles that are really "comp". My story is mostly contemporary, with a magic/fantasy element, and every comp I look at is too much fantasy. I'm looking for a comp that happens in the real world, but has something extraordinary happen in that real world. No tornado, or magical wardrobe, or special school that takes my MC out of her real world, or offers her any guidance or support. She's on her own, with parents and bullies to contend with as well.

So I gave up on comps and now I'm trying mashups. Currently the best I can do is Beezus (my favorite, yet mostly overlooked character) meets Spiderman. Ordinary kid, real world, suddenly has powers to learn about and use, while keeping it secret and trying to live a normal life. I'm thinking it's not a main character, but a strong secondary character - like Beezus, but updated.