RE: Low wing trainer?
If you don't mind building, the Sig Astro Hog is a fantastic plane. Built per plan it has a good bit of dihedral and is a very stable flyer that is meant to fly 'on the wing' versus simply drug around by the prop.
But, it is a design from 1950 something and a long running joke about the build is, "Keep the chainsaw good and sharp."
It has instructions to build as trike gear or tail dragger. A .61 two stroke or .70 four stroke will fly it well. A .75 two stroke or .91 four stroke is even better for a lot of people. My Hog has a .70 FS and my brother has a .91 FS on his. Both fly great; his has stronger vertical climb but mine will do big round loops easily with the smaller engine.