I tried a new heirloom last year, called Goldie. It is now my favorite. Here's a Goldie and a Tiffen Mennonite. The Goldie is large and full of flavor. Tiffen Mennonite has a milder flavor than Goldie.
Tiffen Mennonite-likes dry hot weather.
Cosmonaut Volkov-likes more cool weather.
Grow both if you have unpredictable summers, then you will have a good crop of one or the other.
Both are heirlooms, have great flavor, and are good for making everything.