HiRoald Dahl and Enid Blyton when I was younger and still today tbh. I remember the Cherub books by Robert Muchamore being my obsession growing up.
James Dasher (Maze Runner), Veronica Roth (Divergent), and basically any author who specializes in YA books.
R. J. Palacio did a great job writing Wonder and I'm still amazed at how she did it.