These two are indeed great, especially Terranigma. Really underrated RPGs with Terranigma unfortunately not releasing in North America at all.
That said, FFVI takes it for me with Chrono Trigger right on it's heels. Hell, I may change my opinion in a week
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Both are just such a great games. Chrono is very streamlined with a great cast and a more modern feeling so to speak. FFVI though was epic at the time and still to this day is one of my favorite JRPGs of the era as well.
Both are amazing but FFVI "scale" take it for me so to speak.