So, if you don't mind fussing with unknown programs, OBS.Ninja is kind of cool. OBS.Ninja is browser based.
I've only used it in a testing environment, never for a real production. I wanted to use it because using OBS.Ninja and OBS Studio would allow me to record each person's voice on a different track to help in post production for a higher end result (hopefully). It would allow me to increasing the volume, cutting out coughing, in post.
I would suggest watching videos on how it's used because I personally needed to watch some videos to wrap my head around the program.
OBS.Ninja does have a limit on the number of people you can have on a stable call because it's peer to peer and also free... i think around 10. anything more an the quality starts to take a big hit.
I've also heard people use Discord, but I've never used it for video chat and I think even less non gamer people use discord.