More than one pleco in a 55gal

I am sure it will be fine but I was curious if there is any thing I should be informed of if I was to place another pleco in my 55 gal that houses my angels?

There are 1,000s of Plecos. Some get 2 feet some only grow to 2" What pleco do you have in mind?

The two I have are just the common high fin plecos not sure of the L-? the reason I was moving the one is it has outgrown my 20gal that has a pearl gourami who is just a mean fish that refuses other tank mates along with a rainbow shark who also is mean and will not let other fish live in peace.I am worried that the growth will be stunted an shorten the life span as the pleco is a good 6 1/2 " to 7"