From what you've shared it sounds like Cyl. 1 is getting no spark. Turn the engine on, pull the #1 plug wire from the distributor cap and hold the wire close to the cap. The sparking should be really obvious. If there's no sparking, or it's super-weak compared to the others, then you've found your problem, and need to see why your distributor is weak on #1 and trace back from there. If the spark is solid enough there, then pull the plug itself out and run it and see how the spark looks on the plug.

I'd be really surprised if it's not a bad/misgapped plug or bad distributor or something dealing with bad spark.