Good water control plants?

My neighbor has an underground spring that rises in her yard. She’s created a small pond in the perpetually boggy area, but needs some foundation plants to put along the fence line to help control the mud and mush (the fence keeps trying to fall over, no matter how deep the fence posts are buried, and we all know that good fences make good neighbors). It’s too close to the house for willows (they have invasive root systems). I was thinking maybe laurels. Anyone have any suggestions?