OK, so you want mostly early season figs (because that is when sales are best), some mid season, and try a couple of late varieties. There are some low-tech tricks to extend the season like a second hoop, composting inside, rocket stoves, and adding thermal mass (water barrels painted black).
For market you want larger figs because there is less picking to fill up a quart and people just think bigger is better, unless they know better. They should look good! No one will buy them if they are small with a boring color or spotted and even if they taste great. Save the ugly/tasty ones for your best customers or try selling them to chefs.
My top suggestions for you to add are: Sal's C/Red Italian/Weeping, Atreano, Lynnhurst White, Italian Honey, Kathleen Black, something green and red like Verte/JH Adriatic, Sweet George, Longue d' Aout, Giant Black German, Stella, and Dotatto. A bunch of these varieties are actually up for sale on eBay right now from a few different F4F members, you may be able to get a good deal on a variety you want.
Herman2
mnedelcu
saxonfig
northeastnewbie
There are others who are not selling right now and can add themselves if they like. I would not mess with el cheapo nurseries or unknown figs from unknown people.
Hope this helps!