My lawn is being invaded by two other types of grass. The main lawn is Wintergreen couch. I've included photos of the two grasses that are invading. One has very big wide blades of grass, the other one is slender and tall. The taller grass is mixing with the Wintergreen, while the wide bladed grass is replacing it. Is there a way to fix this without getting an earthmover to dig out the grass and replace it with turf?

wide bladed invading grass

Wintergreen couch

tall slender invading grass at the top of the image, Wintergreen couch at the bottom of the image

you can see a kind of island of Wintergreen being surrounded by the wide bladed grass