Dr. Meader hybrids have done well for me in NJ. They ripen in July.
Jan, Joel, Joy Dr. Meader cherries - General Fruit Growing - Growing Fruit
I planted Nankings two years ago, no flowers (maybe 3) yet but they where quick to get established and quickly despite now growing in the shade.
I also planted a couple of Hansen Bush Cherries, Prunus besseyi Western Sand Cherry. Has not established or grown as fast as the Nankings. But its considers a low grower.