My favorite is Amy’s spinach pizza. Trader Joe’s spinach pizza used to be Amy’s re-branded, but they switched manufacturers a few years ago and I don’t like the “new” version as much. Now I have to pay premium for Amy’s brand name
Trader Joes favorite frozen pies include the Pizza Parlano, which is essentially a supreme pizza. Not for the salt averse, but I love it. I also like TJs burrata, prosciutto, and arugula flatbread and the tarte d’alsace mentioned by @Ns1
For something different, I like the frozen Vicolo cornmeal crust spinach pizza.