My, my Grim, but you have dated yourself. Okay, who owns the lonely heart? Kidding.
Might I hazard a guess, at both no less?
Aulë, and then Manwë (on behalf of Yavanna), from The Silmarillion, Quenta Silmarillion, Chapter 2, "Of Aulë and Yavanna", page 43 (1st edition, hardcover (this is for all of you pedants!)).
for Aulë:
It is told that in their beginning the Dwarves were made by Aulë in the darkness of Middle-Earth; for so greatly did Aulë desire the coming of the Children, to have learners to whom he could teach his lore and his crafts, that he was unwilling to await the fulfilment of the designs of Ilúvatar.
(emphasis mine)
AND for Manwë, at page 46:
"When the Children awake, then the thought of Yavanna will awake also, and it will summon spirits from afar, and they will go among the kelvar and the olvar, and some will dwell therein, and be held in reverence, and their just anger shall be feared." ... "In the mountains the Eagles shall house, and hear the voices of those who call upon us. But in the forests shall walk the Shepherds of the Trees." (emaphasis JRRT's)
The second is fairly tenuous, as it appears the Ents were contemplated in the Song, but, it is respectfully sumbitted for your approval, Grim.