power towers is confusing at first, but set it to noob + rush and you'll have fun with it.
Minotaur TD 2 is a very unknown TD but is pretty awesome!
If you don't like to maze:
Burbenog, only 4 players but it's been around for ages and with good reason, it's fun!
can't really think of much more of the top of my head, gem td is a bit weird for new players as you only get 1 tower per wave. element is very good but you already tried.
There's always the "TD Survivor rev" series.
Bear in mind i don't do team td's
