In theory, all such "set up a wiki in 10 minutes" sites should be listed at the WikiMatrix.
If I were you, I would go through the WikiMatrix Choice Wizard.
It asks a bunch of questions.
At the "Software or hosted?" question, it looks like you want "I would like my Wiki to be hosted by someone else".
After asking all those questions, it gives a list of wiki hosts that meet the criteria you give -- hopefully you can find one that works adequately relatively quickly.
Don't worry about picking the "wrong" host -- if you later decide the host you are using lacks some essential feature, it's pretty easy to pick up all your content and move to a different server, leaving behind a "Moved to ..." message.