Does anyone know some good settings to create a nice tall Oak Tree and/or Maple tree.

I've spent alot of time adjusting settings to get a good looking tree but I haven't been very successful. I've made some decent looking bushes and other types of trees but these two are giving me a hard time.

This is what I want to do. When I create a house, I want some trees behind the house but taller than the house so they are visible from the front.

If anyone's got some settings I can try out, I'd really appreciate it.