Very true Rajesh.
Of course, fans of earlier movies would cite NT and Banumathi.
But here's the beautiful truth. Performing with NT means you have work bloody hard to be in par with him. I don't think NT can tolerate slack performance in his partner's part.
That is why you can rarely see bad performance from the heroine.
I usually see this glitch in newcomers after the 70s. The lady in Gouvaram (forgot her name, Rama Prabhha?) who was really bad. Like reading off a teleprompter or something.
So, my point is this: Most of them are a treat to watch. For glamour (not contemporary but old fashioned), you have Devika. For fun, your have BS. For friction and tension you have JJ. For family emotion, you have Padmini and KR V, so on...
And thanks to their great performances with NT, we have our own little favourites. That is a gift NT and his co-stars have given us.