BTW, The original songs from this batch are a little more soul / motown / early 60's british invasion type stuff. It's hard to put a label on it. Oldies / Retro would probably be the best way to put it, I guess lol.
Based on the top production value and your great vocal here I would definately be willing to purchase your own songs.
I'm a sucker for soul & motown and your voice really seems suited for this type of music. It's something that I personally hadn't noticed when listening to the other covers you've posted but I guess that's because they're Beach Boys songs.
You really are an awesome singer! And I hope you'll proceed with this project as you obviously have too much talent to just continue covering the Beach Boys (which you are superb at, I should be quick to add...)
The only criticism I have of this version of Old Man River would be that the tempo makes it sound a bit too old-fashioned for my taste. Like someone else has noted I was also reminded of some of Sam Cooke's funkier tracks. Personally, my favourite versions are the BB one and the more mellow take by Jim Croce so that probably obscures my view. But other than that, you really nail it. I'm really impressed by the professional sound you get on your recordings. Do you record / play music for a living?