Maybe a Banshee Morphine, or a Sinister Ridge. I don't think those are in your budget, but it's not very common for a bike to withhold the stress of a DC fork. You might need to throw $500+ for a bike that can. Maybe a used one, I'm sure there are some out there.
you really aren't going to find a hardtail that can safely run a DC fork for 200-300 dollars, you best bet if you need something inexpensive is the upcoming soul cycles sluggo. A banshee morphine would also do the trick.