Personally I found it really hard for a while to eat pizza without cheese & found that vegan cheese's just didn't cut it for me! So here's how I regularly have my pizzas now! This way I find they don't dry out & all the pleasure of eating pizza is still there :-)
Of course you can pick and choose your own favourite veggies as topping but my favourites are:
Spring onion, capsicum, mushrooms, pineapple & baked beans.
I make sure i put the mushrooms on the bottom - directly onto the sauce, followed by the spring onions, capsicum then the pineapple on the top and lastly the baked beans.
This system seems to prevent the pizza from becoming dry :-)