I do like Lalor as well, but for mine the best player in this draft will be Langford for the reasons outlined below:
The only knock on Langford is his lack of pace in testing. Langford compensates for this with elite footy IQ , decision making, and game awareness, physically being able to stand up in the tackle and dispose of the ball to advantage, an elite left foot kick that can spear passes up to 60 metres, an elite mark overhead, and borderline elite endurance. Langford can also swing forward and be a major goal kicking weapon. Langford has been elite at every level he has played at this year, and was the joint winner of the Larke Medal. Additionally, Langford has been exceptionally durable this year, which can't be said for Lalor, Draper or FOS who have all had significant injury concerns at various stages throughout the year.
With Darren Burgess working on Langford's fitness, Langford would pick up a yard of pace over his first 2-3 off seasons, increase his endurance, strength, and running power, and become an absolute weapon through the middle and up forward.
Look at Brownlow Medal winners over the past 40 years, to my mind less than 5 of them had what you would call elite pace, and over the course of a 200+ game career, typically pace is the first attribute to go. Elite footy IQ, decision making, game awareness, endurance, strength in the contest, durability, disposal, marking, leadership, and, goal kicking ability are far more accurate predictors of long-term success in the AFL. Langford has all of these attributes.
Everyone is open to their own opinions, but focusing on Langford's 'lack of pace' is a massive flaw in the overall analysis of Langford's traits and abilities which for the most part are elite at AFL level. Lack of speed can be compensated for at AFL level, lack of footy IQ, poor decision making, poor disposal, lack of game awareness, poor marking, poor goal kicking are significantly harder to atone for, compensate for, or fix in a substantive way.
Brownlow results are terrible metric to include when judging game impact.