I dearly love The Economist (and, indeed, have a small stack of them about a foot from me right now), but I do sometimes get the feeling that reading a newspaper with which I agree so strongly on almost all issues (hell, even the advertising feels like it's targeted at people just like me) is probably a little unhelpful in terms of giving me a balanced perspective on the world. I'm not sure what one can do to balance this, though - I picked up a copy of Nexus (https://en.wikipedia.org/wiki/Nexus_(magazine)) recently and that didn't really much help either, though it was pretty damn entertaining.
I'm not sure what one can do to balance this, though
Try reading magazines like The Spectator, The National Review and The American Conservative. Even if you don't agree with everything they write (or especially if you don't agree with everything they write), they're on the whole well written and present their view in a pretty well argued manner.
I have a friend who is a intelligent, die hard progressive who makes it a point to read the most extreme right wing news sites, just to glean how a person on the other side might view and construct the world.
Maybe that is a bit extreme, but I think Economists readers (I think the publication is center right?) can pick up a center left or far left publications from time to time.
It's a bit tricky to pin The Economist to either the left or the right; they describe themselves as being "radically centrist". This Quora answer from an Economist writer is good: https://www.quora.com/Is-The-Economist-left-or-right