Can you replace with the same small ones? Or else, do what I have done, in a similar situation where small shrubs were planted to fill in space, but have now gotten bigger. I kept some of the shrubs but moved some out, so that the bigger size still sits and fits well where it is.

I found some Micro Yaupon Hollies. They grow sun/shade/wet/dry/clay, whatever. They don't bloom or produce berries but are nice tidy little evergreen native shrubs.

Thought about replacing the three with the smaller species. Have never seen the Mirco yaupons. Will goggle them.