Training Suggestion for Muscle Development

I'm looking to pack on some muscle and wanted to get your input on the best workouts. I've been browsing online and found some info on compound lifts, isolation exercises, and split routines (ppl workout, upper/lower).

In your experience, what workout split structures have yielded the most significant results in terms of lean muscle mass gains?

Finally, gotta fuel those muscles! Any recommendations on nutrition for bulking up?