In plain words
Among human beings there is none who does what is dearer to Me than such a person, nor shall there ever be anyone on earth more dear to Me.
Word for word
And among human beings there is none who does more what is dear to Me than he; nor will there be another on earth dearer to Me than he.
The commentators
Bhagavadgītābhāṣyam
किञ्च —
न च तस्मात् शास्त्रसम्प्रदायकृतः मनुष्येषु मनुष्याणां मध्ये कश्चित् मे मम प्रियकृत्तमः अतिशयेन प्रियकरः, अन्यः प्रियकृत्तमः, नास्त्येव इत्यर्थः वर्तमानेषु । न च भविता भविष्यत्यपि काले तस्मात् द्वितीयः अन्यः प्रियतरः प्रियकृत्तरः भुवि लोकेऽस्मिन् न भविता ॥ ६९ ॥
In plain words
And there is more —
And there is no one among human beings — no one at all — who does what is more dear to me than this: exceedingly dear, indeed the dearest thing anyone could do. No one else comes close, among those alive now. And in all the time to come, no one will ever come closer, no one will ever be dearer to me, no one will ever do what is more dear, anywhere on this earth.
Close to the Sanskrit
And what further —
And there is not, among human beings, among human beings, anyone doing what is most dear to me — my — exceedingly doing what is dear; another doing what is most dear simply does not exist: this is the meaning, among those [currently] living. And there will not be, will also come to be, in time, than that [same transmitter], a second, another, dearer, more dear-doing one, on earth, in this world, will there be.