l agree with all the warnings about wanting to teach you TAB. I went to a teacher who predominantly teaches guitar, but I said to him that I wanted to sight-read rythm. I'm a big fan of James Jamerson and Chuck Rainey, and sight reading the variation in Motown, or Chuck Rainey's Steely Dan numbers is a good way of learning that style.
The teacher would deliberately give me tracks to sight read that he knew I didn't know, so the lessons were always challenging. His worst trick was to play me a track and ask me to write out the music from scratch! After the lesson, I could always go and do the You Tube cheat, but it was always to help me nail down the written score.
Coming back to complicated scores some time after learning them is also a really good refresher. Dean Town is a good one, as is the chord change on the original Marvin Gaye Ain't no Mountain High Enough. And if anyone can teach me how to nail the middle passage of Paladino's Any Where I Lay my Hat...I would appreciate it!