As already mentioned the tone of the octave is the key thing here.
all of the pedals named will do the octave down, but I found that the oc2 was very synthy, and didn’t fit the context, the ebs octabass was too polite, and the mxr bod was ‘just right’ for Goldilocks lol
With all of these, I’ve had no issues until getting down to a low f on the e string.
my favourite single octave down is the older dod octoplus- great pedal, but it’s size is the handicap. If only there was a clone of it