If you consider communism as far left, then yes the far left has absolutely killed millions. If you do not consider communism far left, I don't know what to tell you.
Not that I necessarily disagree with you, but you're going to have to define your terms more narrowly if you want your argument to hold. Which countries, who's "we", are we talking state actors or individuals, how to Maoist rebel groups in Asia and South America feature into your calculus etc.
Which means you need a time range to care about.
And 'relevant'?
Is a murder in Sri Lanka relevant? New Zealand? Venezuela? Just the US? You seem to be being as obtuse as possible.