It's too hard to list 5 pianists who are better than any other, so I'll just give my opinions about a few who've already been mentioned.
Olga Kern is one of the most incredible pianists alive. Her recordings are wonderful, but she has stage presence like no other performer I've seen. Your attention is riveted to the music from the moment she touches the first note 'till the moment she finishes the last.
Why do you mention Rodriguez, out of curiosity, Scarbo? Any specific recording or concert?
Argerich is definitely not on my list of the best pianists, nor is she even on my list of good ones. Her recording of Rach 3 (don't know which year) is unforgivably bad, as are her overdramatized recordings of Bach's works. Even her recording of Chopin's second sonata is not particularly noteworthy. The second and fourth movements are done well, but the march is played too fast. She plays with passion, indeed, but she is passionate in all the wrong places.

For those who haven't heard, Van Cliburn came back to the concert scene this year after a 20ish year break, and messed up pretty badly. Though he once once a wonderful pianist, I'd say he's well past his prime now.
Yundi Li is quite a wonderful pianist. Though he has impeccable technique, this does not overshadow his very expressive playing. A top-tier musician by my standards.
But it's all opinion anyway, so whatever.
