Which dinosaurs do we know had feathers? Did any herbivores have feathers?

Carnivores are usually found with fossilized feathers when they are excavated, this includes popular dinosaurs like the Velociraptor and Tyrannosaurus rex, and not as popular dinosaurs like the Ornithimimis and Ovaraptor. But there is little amounts of proof found that any herbivores had feathers, even though it is very possible.