Combining Multiple USB Mics into One Input for Improved Zoom Conference Audio Coverage

So I have a conference room I'm trying to get more mic coverage. We're using Zoom and people are complaining that audio coverage is spotty. I guess Zoom Rooms has the option for multiple mics to be added, but we just have a business zoom account.

Current setup: I've got a blue yeti set to omnidirectional, but the room still needs more mics.

Problem: I can't set up multiple computers, have them join the meeting, and use that as additional sound coverage lest I get feedback, so is there any suggestions people have for getting multiple inputs combined into one so I can feed it into the computer and everybody's happy?

Here is the solution from zoom:
https://support.zoom.us/hc/en-us/articles/115003321963-Configure-Multiple-MXL-Microphones

But you can try to use some kind of mixer in front of the computer's audio input. So that the mixer combines the signals from all microphones and additionally unifies their amplitude. This ready signal from many microphones is fed to the computer's audio input. It might be a good idea as you are using not only Zoom but Microsoft Teams as well.