Caroline,
I have had great success with the different Alpine seed varieties. My fave was Alexandria. Also liked Treasures, which had red, pink & white flowers with a bit bigger fruit than most Alpine varieties. Alexandria produced more fruit than Mignotte for me. You should start the seeds indoors early to mid February. My Mom has 3 Alexandria plants in her Zone 1A flowerbed that have been prolific for at least 5 years now. Alexandria is a nice 1 foot x 1 foot mound, no runners and is ever-bearing.
Most of the "large" fruit "garden" varieties are only available by plant sales, not seed. They are easy to propagate by runners.
Joanne
