You should. Nick based his fast-picking style on Bert Jansch as far as I'm aware and used to play Bert's songs at his early gigs. Paul Simon's folk guitar picking was also heavily influenced by him. You can clearly hear the thread running through them all.
There is always John Martyn, his 'Solid' Air' was a song written about/for Nick Drake
The Solid Air album has been one of my 'top 10' since release. Up there with Astral Weeks IMO.