if you say pinakamalupit in the sense of being a band (that is, the whole is greater than the sum of its parts, and those parts kick ass, live and in the studio):
Foreign:
Tower of Power
Mr. Big
Rolling Stones
early Incubus
Tool/APC
Parliament Funkadelic
Local:
Radioactive sago project
Ugoy-Ugoy
early POT
Loss of Control
Sin
INK (ImbueNoKudos)
UrbanDub
Sugarfree
As always, your mileage may vary...