The three you mentioned are all good.
Guerlain Vetiver remains one of my all time favorite fragrances and is a classic. Definitely try that one. It has a good bit of citrus in the opening and noticeable tobacco later on.
Encre Noir is more of a straight vetiver smell, rather dull textured, less lively and effusive than the Guerlain.
Grey Vetiver lies somewhere between the two in overall style. It has some citrus and is brighter than Encre Noir, but lacks that tobacco and strength of the Guerlain.
None of these are the soapy vetiver you get in Creed Original Vetiver. Adolfo Dominguez Vetiver and Thierry Mugler Cologne are similar, soapy vetivers.
Fragrances where vetiver is well mixed into a blend include Lanvin Vetyver and L'Occitane Vetiver. In these fragrances the vetiver doesn't dominate, but is more subtle and part of the overall mixture.