Your definition of propaganda probably is a little to inclusive. In my experience, the Economist very rarely gets the facts wrong (including by omission of major elements). The "letters to the editor" at the beginning of every issue are also almost always critical of previous issues of the magazine, and they don't have a problem with publishing them.

What the Economist constantly does is give its opinion on the facts, and that opinion usually sums up to how good free-trade and libertarian policies are. I definitely wouldn't count that as propaganda. You could, but then any newspaper with opinion pieces would be propaganda, which is not what is normally meant by "propaganda".