Setting up Wired Plex Media Server with google Wifi

I currently have Google Wifi with a wirelessly connected Plex media server. The media server (which I also use as my home/office PC) is the furthest device from the modem/base router puck. Between the base router puck and my server are two additional pucks that are both needed due to the length of my house as well as the multiple plaster/lathe walls that seem to kill signal significantly.

Often times when playing better quality media (larger file size) on devices scattered throughout my house I have buffering and/or video quality issues. Remote streaming is almost always a no go, even with lesser quality videos. Internet upload/download speeds aside, I am wondering if plugging my server directly into the base wifi router node or even in to a switch that is hooked to the base node/router will provide a significant enough improvement to mitigate the issue.

If that is something that would help, is it just as easy as plugging the wired connection from the server directly in to the main wifi puck or will I need to throw a switch in there somewhere?

Thanks!