I can recommend a bunch of things, i'm glad you like instrumental music.
Nick Johnston - Remarkably human
Great melodic album, i love it, i highly recommend it, he droped new album which is also quite good but start with this one, here one song from the album, so melodic and good.
Gentle Gaint - Octopus
They are prog rock band from 70s and they are great as hell, start with this album as i think it's easier to get into.
Salamander - The Ten Commandments
They are very obscure and very underrated, every song on the album is fucking great, they are prog rock band from 70s too, i think this is their one and only album, it's great.
The Moody Blues - Days of Future Passed
Just pure masterpiece, nothing else to add, really, it's late 60s proto-prog record.