I don't know exactly what you mean by "Real" pizza! There are tons of veggie pizza recipes, that I've tried, that I would consider real - so I'm not sure if what you really mean is what would make a good meat substitute and taste like the pizza is meaty? If that's the case can't help too much. But I'll share some of my favorite veggie pizzas. Also, if you're still short on ideas, look at an UNOs menu, I know they have several good vegetarian-friendly pizzas.
Margherita - tomato, fresh mozarella and basil on thin crust is a true Italian classic! (If Italy is your standard, this is more real than the pizzas covred in meat).
Other toppings I've had on pizza include - peppers, onions, mushrooms, squash (I've had butternut, summer and zuchinni - all delicious), olives, ricotta, feta cheese, garlic, spinach, chunky tomatoes, roasted eggplant.