I agree. I think less is better with any kind of pizza, really. No more than two toppings in addition to tomato and cheese (if tomato is used).
Unless it's a Quattro Stagioni, which by definition has four additional toppings. But they're placed in separate quadrants of the pizza, not mixed together. Obviously, they represent the four seasons.
Here's what seems to me to be an interesting recipe for English Muffin Bread. It has a low rating, but that's because one reviewer was pissed off because the recipe was expressed in cups, not weights.