All those goals are good of course, but best you have ever seen? The Rivaldo goal is a good shout as well for me, since the technique is absolutely perfect. However, at the end of the day, for me, it really isn't something I haven't seen variations on.
Bergkamp v Argentina is the same for me; brilliant, but not out of this world. Same goes for most of the other goals mentioned here.
Roberto Carlos's freekick v France, and Bergy v Newcastle on the other hand - I have never seen anything like that, either before or after.