Right now I'd rank Django Unchained at about the same level of A Fistful of Dollars and For a Few Dollars More, which is pretty impressive considering that it's pretty new and will be better judged over time. I'm a big Tarantino fan and Inglourious Basterds I initially loved (like DU) but now I would regard even higher when compared to other films I love.
The Good, the Bad and the Ugly and Once Upon a Time in the West are both films I'd rank higher, although that's because I consider both masterpieces. I wouldn't use a phrase like the film 'doesn't deserve to lick the mud off the boots' and think it's pretty harsh to compare them, Tarantino admires the dollars trilogy as much as anyone, he thinks TGTBATU is the greatest film of all time and in his film he pays homage to lots of Spaghetti Westerns, especially Leone's. All these films are great but should be viewed in different ways to me, although both Westerns they are very different.
The Good, the Bad and the Ugly and Once Upon a Time in the West are both films I'd rank higher, although that's because I consider both masterpieces. I wouldn't use a phrase like the film 'doesn't deserve to lick the mud off the boots' and think it's pretty harsh to compare them, Tarantino admires the dollars trilogy as much as anyone, he thinks TGTBATU is the greatest film of all time and in his film he pays homage to lots of Spaghetti Westerns, especially Leone's. All these films are great but should be viewed in different ways to me, although both Westerns they are very different.