What are dragon Pokemon strong against in all Pokemon games?

A pure dragon Pokemon is only super-effective against other dragon Pokemon. However, due to their insane stats most dragon Pokemon can take on all of the other types. Just as a reminder, dragon Pokemon are weak to ice and dragon type moves, and resistant to electric, fire, grass, and water type moves.

This answer only applies to pure dragon Pokemon. Extra types such as flying/dragon, will have more weaknesses and strengths.