I love Otis Redding.  I listen to him quite a lot these days on Pandora.  Pandora (the subscription my niece gave me was my best Christmas present, ever) selects songs that are similar to the songs you have already identified that you like and then plays them to give you an opportunity.  This morning, they played a cover of an old Otis Redding song titled These Arms of Mine by Tab Benoit and Jimmy Thackery.  If you like Otis Redding and blues ballads, it does not get much better than this.  Tab Benoit is amazing.

Tab Benoit & Jimmy Thackery LRBC 06 ” These Arms Of Mine “