Agreed. The Most and Best action was R/S.
Although, G/S/C is definatly second.
I picked GSC because it involved action from the dex holders in Kanto and Johto. But it's definitely a toss-up between R/S and GSCI agree. Coin toss between R/S and GSC.
I would have to say R/S, followed closely by G/S/C. I haven't read FR/LG yet.