In Ramayana, Vaalee is a valiant person, great warrior, by himself. In addition to that, he possessed a unique strength - a strength of attracting half of his opponent's strength towards him, his advantage, and make himself invicible in a war situation. So whoever be his opponent he would never be able to win vaalee so easily. That is why, Raama had to kill him deceptively from hide (a blot in raama's character despite that act was very much needed).
Now we can understand how lyricist rangarajan of srirangam is named as valee. Be whatever his opponent, not necessarily a rival poet, even the situations that warrants lyrics for blogger buds era whereas he is from the era of OCS, Vaalee attracts the opposition's power towards his advantage and comes out successful. Indeed it is a fitting name to this writer -- a deft jack of all kind of lyrical situation. Indeed a versatile writer. Using azhagan, azhagappan (mamootty's) speech in banupriya's dance concert, Vaalee is uppuma (not in any 'mean' sense, but in a strict vegetarian sense).
So, IMHO, Vaalee will always be there everwhere, so he should be discounted from the race (after KKD who is it?).
So, after KKD it is indeed VM.
However, despite his strength and his own knowledge, I don't consider VM to be in the league of KKD. KKD is KKD, a league on his own.