Few Instrumental titles which I like are ...
1) Pt. Hariprasad Chaurasia (Flute Fantasy/Raga Hemavati, Des )
2) Devendra Murudeshwar (Flute Raga Kedara, Jhinjoti)
3) RaagRang (A tapestry of Indian Classical Instrumental Music)
This could be a must have as it has Ravi Shankar, Ali Akbar Khan, Vilayat Khan, Bismillah Khan, Shiv Kumar Sharma, Hari Prasad Chaurasia)
4) Bismillah Khan (Bhairavi, Shyam Kalyan EASD1373)
As not much of a shehnai fan this is the only one I have as most others I have not liked.
5) Shiv Kumar Sharma (self titled ECSD2229)
6) Shiv Kumar Sharma (The heavenly sound of Santoor)
again some shiv kumar sharma are considered rare like 'purple and gold' and 'melodies of romance' but I have not liked them.
I mostly like to keep artist albums which they produced when they were aspiring and young.
Regards