malwarebytes seems to come out at/near the top in every test I have seen.
TD: I had a look at my BIL's laptop at Christmas - he "can't be bothered with antivirus" but "suddenly it's not working". (I know, multiple rolling of eyes and headshakes).
MWB (run in safe mode) found 133 different threats, trojans, etc. Probably not a record, but it surprised me.
I cleaned his laptop up and put a free antivirus on it, but since he "can't be bothered with such things" it will probably fail again very soon.
PEBSAK !