If I can expand on the link you provided...
I teach a class on Computer Security and always share this link with the students:
http://chart.av-comparatives.org/chart1.php
This chart is published and updated every month. Watch out for false positives. They can be more trouble than a real virus.
You can hover over each black bar for more info.
Ya gotta like BitDefender. Very high detection rate, minimal false positives and excellent articles about it.
Personally, I don’t like Avast as I find it way too intrusive.