At its best I don't think any ready made pizzas you buy in the frozen section of the grocery store are amazing. However, I have found one which I do like, Against the Grain Gourmet.
I have had two of the toppings, the pesto (which I love) and pepperoni. I find if you bake it a few extra minutes the crust gets nicely crispy, the recommended lines leave it a bit floppy in my oven at least.
My preference is still making pizza or going out, but for when I want to stay home and be lazy, or I'm only cooking for myself, I really like this pizza.