I didn't enjoy my time on Aconcagua way back in the late 1990s. Far too crowded and commercial. Always had an inkling to go to Ojos de Salado instead, a few metres less high but much more remote and quiet. It never happened, unfortunately. Anyway, here's a film of a recent ascent by the very talented Harmen Hoek, which confirms that my assumptions about Ojos de Salado would have been correct. Looks a marvellous peak. Well worth watching for the stunning photography.
https://www.youtube.com/watch?v=2uZTgmz0jrs