Ronnigers, I know them well! Back in the early 90’s I used to order from them.
You might try some of the Alaskan taters. They have a short growing season up there, and might do well where you’re at.
I personally find potatoes to be one of the best growing crops. Onions too!
I might try the Alaskans. Thanks! I did get some yellow onion sets from Ronnigers also and they did pretty well.