Batch resize pngs to a uniform size

Hello!

I have a folder of 1000+ pngs sized to 1 x 1 @ 150 dpi. Some random files were sized incorrectly and need to be fixed. For example, one image is sized incorrectly at 1.333 x 0.986 @ 72 dpi.

Can anyone give me a good workflow to make all files uniformly sized at the proper Height Width and dpi? Perhaps a script, plugin or set of actions that might accomplish this task?

Thanks for any assistance!