My dad was born in the Muscle Shoals area, so I grew up listening to Skynyrd in the garage hanging out with him, along with plenty of Allman Brothers and The Outlaws as well. My dad's more of a country guy, but he always had the good stuff from classic rock on when he rocked out.
One thing I always liked about Skynyrd, is how they were musicians first. Both Allan (Allen?) and Gary took solos, as well as the pianist, and no one instrumental overtook the other very much. It was definitely about playing together as a group, than one person getting the spotlight. I feel the same for the Allman Brothers as well: fantastic multi-guitar work where the songs are multiple guitars written to be played together.
For me, it doesn't get a lot better than the Jailbreak era of Thin Lizzy: the 2 minute "dueling guitar" style solo from Emerald
is just outstanding. You can tell when one or the other is playing, and the guys are not only tastefully shredding, but they're changing effects too. You can hear a phaser (which in 1976 I can only assume is either an MXR Phase 90 or a Mutron phaser) at a couple spots there.
Small Thin Lizzy addendum: though I love the Scott Gorham era, nothing quite beats Eric Bell's wah-infused solo from The Rocker
. It had this soul to it, and that epic wah tone, that was almost Hendrix-like.
Some of the guitar work from Casey and Rob from The Dear Hunter is amazing like that. I say "some" because even though everything they do is amazing, they don't put guitar front and center for every song, which I really like. They play like old-school "guitar is an accompaniment instrument" mindset, which is amazing in this day and age.
Both guitarists from each of the bands Brand New, Thrice, and Minus The Bear all do killer interplay stuff too!