Many are called by the gospel. Multitudes hear some degree of gospel and respond to that word that is preached.
But that is not 'coming' to Christ himself.
Within the vast multitude of persons responding, to some degree or other, influenced by a whole variety of motives (some of them totally carnal, some of them grandiose and self-serving, some of them motives from within a good heart) , within this diversity, some are being truly drawn to Christ himself.
These are the 'chosen' being 'drawn' to the real Person of Christ by the true Person of the Father.
These are the 'few' among the 'many' called.
I can perceive no contradiction whatsoever, myself.
And it is my lifelong, personal experience and my lifelong, personal observation as well as my understanding of the word of scripture.
The parables of Jesus, especially the parables of the kingdom in Matthew, express this very thing - an appearance (the kingdom of heaven is 'like' this and that . . . ) that is larger than the true essence.
Fish are caught in bulk, trapped in a net : then they are sorted and some are rejected and thrown back.
Many are called, few are chosen.