All are great but I voted for the one that belongs to my favorite spaghetti western - For A Few Dollars More
Yes all three themes are Morricone at his best. The two first are rather alike with For A Few Dollars more the preferrable in my view (as well as the whole movie). Maybe I would vote for that one.
The Good, The Bad And The Ugly theme I heard as youngster when it was in the Swedish pop charts in the 1960’s and it is somewhat different maybe more complex and it reminded me then more of indian war movies.
But the Ecstacy Of Gold theme from that same movie might beat them all, just beautiful ! https://www.youtube.com/watch?v=PYI09PMNazw
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