Sounds like the easiest and most practical thing to do is to pick up Tmax-100, Delta-100, and Pan-F+, process it in XTOL or something and see if one of them meets your needs. Personally, I have not noticed much difference (or if any at all) using different developers for a given film but my experience is small.

Anything beyond these, you may run into supply problems in short order.

Otherwise, you may just have to go "bigger".... LF in your future?