I'm not talking about 'playing a bit of guitar which is integral to the song'. I'm talking about 30 or 40 secnds of show-boating which, whilst technically impressive, is effectively completely distinct from the song it purports to form part of. Most of the suggestions posted fall into this category, however 'clever' the skills exhibited might be.
Guitar solos are (almost without exception), to music, what pointless additional step-overs are to football.
Oi, check the ones I've suggested out. They completely elevate the songs without stepping outside of them, but they're still "solos" really.