I am a big fan of Continental GP5000's. I run them in 32mm on my CX bike and it's a good combo. These are fast rolling and durable, and at that width they can handle a lot of hardpack gravel trails and roads as well.
Rene Herse gets a lot of love on this forum for wider tires as well. I've never tried them, but they look to be really light weight and fast rolling so if you're looking for something bigger than 32mm with a slick/minimal tread, that might also be a good choice.

Are you running tubeless or tubed?