Dark tomatoes - Black Krim, Purple Cherokee, Paul Robeson - all have a full flavor and are so lovely. Green Zebra is quite acidic - one of my favorites. Any of the "bumblebee" varieties (cherry and quite prolific), Pineapple is an amazing, huge gorgeous, golden beefsteak type, but my favorite is Costoluto Fiorentino altho Baker Creek lists it as Costoluto Genovese. I grew all of these for yrs in large nursery pots in Bellingham.