If we are talking about skills, then sure, Hazard probably wins the argument on being our best player ever. But if we're talking overall, then he isn't because you still gotta consider things like achievements, desire, character, attitude, consistency etc. And Lampard arguably takes that honor. He may not have been as talented as Hazard but what he lacked, he made up for it with hard work and the desire to improve himself. He also showed tremendous consistency with his output (goals + assists) and performance and came up trumps so many times to give us so many memorable moments, in the Premier League AND Champions League.