The Donut Plant is good but I love their smaller, moister cake donuts. I like their bigger, fluffy yeast ones too but sometimes the texture isn't a crowd-pleaser. They're a little chewy. Do a search and you'll see that this topic is hotly debated.
Manhattan, unfortunately, has a lot of bad donuts, too.
Honestly, I'd go to Peter Pan in Greenpoint for a big fluffy old fashioned plain donut.