Wanted an easy top in cotton fabric. Found this pattern: New Look 6356. Yes it says 2 hours, but only if you're experienced, and of course that's only the sewing. The original calls for a back zipper and side slits which I eliminated.
Used some inexpensive Walmart cotton and it turned out to be a wearable muslin. Next one will be a little wider (it's a bit tight) and the bust darts won't be as long.