I have only ever been able to find ONE cover version of OMH- and that's the one my own band did years ago on a CD with my friend and blues singer Kathe Reavis. In a CD of fourteen tunes, that was the hardest one to get down on "tape". Wow. I hadn't thought about it in ages.....
Its funny how the OMH bass riff is difficult for some to get. For a while, when we auditioned a bass player, we would ask them to play it after hearing it. Amazing how it baffled so many. Easy way to take the wheat from the chaff .
Seems like we have the same tastes, Jimbo. I know that harp solo note for note.
It IS difficult. The bass player that I used, Steve Wolf, had been the go-to bassist in the Danny Gatton Band years ago and really knows his stuff- all the session musicians were much better than me. I wrote the horn parts for the tune and did some of the solos, but the longest solo is on a soprano sax (not me, I am not a reed player) If you PM me your surface mail address, I'll send you a CD with OMH on it. Like you say, it is not an easy tune to play. I hope we did a good job.
Years ago, Robben Ford, who is a big fan of Butterfield and Bloomfield, did a cover CD of BBB tunes. I do not think they tackled OMH, but I may be wrong.
Once was in a band with Tim Bogert and we both loved OMH. He loved the Smokey Robinson version, I loved Butter, he hated it. Don't think that band ever played it live because of that, but we were friends anyway. What do you play?