Agreed. It is hard to compare great Christian leaders because they have different gifts. Martyn Lloyd-Jones has had the greatest overall influence over me but he did not write a Reformed Dogmatics like Bavinck or Vos. Luther was a great reformer but he did not consolidate the teaching of the reformation like Calvin did in the Institutes of the Christian Religion.I think it best to leave such questions to our Lord and be content know what honors he will bestow on any when at last we enter into his Kingdom. I am thankful for all of the gifts Christ has given to his church and pray that God will give me the grace to get the greatest good from each one of them as I am able—remembering that these are the tokens of my Lord's ascending love (Eph. 4:10-12).
'Therefore let no one boast in men. For all things are yours: whether Paul or Apollos or Cephas, or the world or life or death, or things present or things to come—all are yours. And you are Christ’s, and Christ is God’s.' 1 Cor 3:21-22