re: Any drills work to eliminate a bad over the top swing?

To shallow your plane, try teeing up a 7 iron relatively high, i.e. a couple of inches, and pick it cleanly off the tee. If you hit or break the tee, your angle of attack is too steep. This will promote a more rounded swing plane.

This drill is great for learning to hit a draw and may help to eliminate your over the top move that can bleed over into other clubs in the bag once you get the feel for it.

It's a little ghetto, but I zip tie my phone to an alignment stick stuck a few inches in the ground and use the Zepp golf swing analyzer app to record swings to get a better idea of what adjustments I need to make.