Help , Need Router Advice

Ok, i have 2GB service with Att. Their access point has 2.5 , 5ghz and a 5gb lan. I put a 2.5 gb lan in my pc and it's lightning quick. I'm getting 2.4 gbps via ethernet

However their routers wifi speeds are not good, like 150 on 2.4 and 400 on 5ghz.
I need a router that will give me 1200 mbps on a single stream of 5ghz. I don't have a huge house and my kids are grown, so the only device using 5ghz in my house is my 85 inch oled, which is pulling about 350 mbps. So I know they rate routers by the number of streams and combine the streams to get a number of say 3000, 5400 and so on. All I'm interested is a router than will get me up to 1200 mbps on one single stream of 5ghz. I need the router to have a 2.5 gb port too, so I can connect a 5 ports switch with each port being 2.5 gb, so I can go out from the 5gb att access point into a switch and then from the switch with one 2.5 ethernet to my 2.5 lan on my pc and the other to a router 2.5 gb port so I can get the fastest 2.4 and 5ghz speeds. I want 1200 mbps on 5ghz.. it's personal, lol. Anyway. Any advice on what router will do that would be appreciated. Thanks and I'm new, so sorry if this has been asked. They numbers on the box if these routers are deceiving unless one is technical.