What's the to-go platform to host a forum?

I have been a long-time user of a comic books forum that unfortunately decided some time ago to migrate to Tapatalk. I now hate even clicking on the forum's link because of the ads, pop-ups, etc. of the Tapatalk format.

I am trying to convince the other users of the forum to migrate to another platform and I was wondering if there is a clear winner between all the open source platforms out there, such as phpbb, discourse, etc.