Ketron strings are clearly above the average of the usual preset strings. But in this context we‘re looking for strings that come close to software libraries.
Talking about big sections, I have always been fascinated about the big strings of the Roland SRX 06, coming from the SR-JV Orchestral 2 from 1999. They can hardly have more than 4 MB of sample size given the small data size of the board, and Eric Persing did a miracle putting such a realism into such a ridiculous data amount.