For apricot cultivars that impress me but also have a wide range of adaptability, I would name Hargrand, Harglow, and Harval for their disease resistance, good flavor, and adaptability.
Two New Jersey apricots are worth noting: Ilona (released in 2015 by Rutgers University, good disease resistance, self-fruitful, large flavorful fruits that ripen fairly early) and Sugar Pearls, a mid-season white apricot, later blooming, fully hardy at -20F and possibly even to -35F in Wisconsin, very sweet, dries well, but requires cross pollination with another later-blooming apricot.
Tomcot has done well in Washington, D.C. as well as Las Vegas although it was initially from Washington State.
|Brookcot. Photo credit Gilby's Orchard|
For people living in Alaska's banana belt, I recommend Westcot or Brookcot, both from the Prairie Provinces of Canada.
For people in the deep-South, if chilling hours are not a consideration, probably Jerseycot or Alfred.