Network Switch that will actually do 1Gb speeds?

I did my friends network and he has some issues. Currently he has an 8 port TP link switch that will just not do GB speeds as needed. Only using about half of the switch right now. This would be nice as there are several devices and lots of cameras. So sometimes the network can be congested.

Any recommendations or should I just get an average run of the mill 16port Netgear For a little extra over head?

Does not need to be manged.

Network map.

Comcast 800mb service> Self Owned DOCSIS 3.1 Modem> Edge router X > some ap's > Switch computers and other random stuff.

Anything before the switch i.e. plugged into the edge router or modem is significantly faster.