I'll add my vote for the Tiny Trainer. I have a Tiny Trainer, a Tutor, and a Scout. The Tiny Trainer is the easiest to fly and also the easiest to build of any of them. It floats so nicely. It takes less damage in crashes. Also, it doesn't have landing gear which takes away an unnecessary complexity for new flyers.
That said, I love my Scout and my Tutor too, but the Tiny Trainer is fantastic for first timers.