Confession: This is my favorite thread ever on basenotes. I apologize if these have been mentioned already. But three unsung that I love:
Estee Lauder's Estee--Always mentioned in 'insecticide florals' discussions. (Caveat--I often like insecticide florals.) I find this a very appealing woody floral. When applied lightly, it has a beautiful arc over time. For you Bernard Chant fans, this is one of his often unmentioned perfumes. I have the pure fragrance spray, but there is another (sport spray or the like) but I believe they are effectively the same. Quite inexpensive and found in any of the dept stores that sell the other Lauder fragrances.
Guerlain's Aqua Allegoria Anisia Bella----Spectacular summer fragrance. An interesting treatise on anise, both direct and complex over time. Made by one of my fav perfumers, Aurelian Guichard. In fact, when I wrote my review of Anisia Bella on basenotes, it ended up seeming a bit like a teenage girl's fan letter. Great fragrance nonetheless, and though discontinued, easy to find on the cheap.
Ines de la Fressange (1999. There is one by the same name from 2004. It is an entirely different fragrance--not a reformulation.) The 1999 is an interesting tuberose-floral that I have to say is not so much odd as an uncommon style. It's got dry peach skin, styrax, woods. Gorgeous, distinctive. If looking for it, it's the one in the octagonal alternatingly clear and frosted glass bottle, not the one with a sort of diagonally draped gold top (2004 fruity floral.) Discontinued, currently still easily found, outrageously cheap. Very few comments to be found on it, but I think it's smart and wonderful.