Anything Lowell George with Little Feat. He moved the target post Duane Allman. Listen to Lafayette Railroad, Down the Road, Long Distance Love, Rocket in My Pocket, Mercenary Territory (esp the live version on Waiting for Columbus). There's a start.I'm not a slide guitar aficionado per say, but I certainly appreciate good slide. I'd be curious to hear examples of good blues or rock slide guitar in standard tuning.