Here's a quick one for Ultraseven, now there were less reuses and i'm unsure of episode order so bare with me on this one

Eleking - Gyango's rotating horn mechanism with Kamacuras shriek
Alien Cool - mini Alien Baltan 2 laugh
Agira - altered Rodan roar, later Zambolar roar
Miclas - Goldon roar
Windom - Mechani-Kong roar
Gabura - modified Goldon suit
Alien Guts - Dada sounds, mini Baltan 2 laugh
Aron - Varan roar low pitched
Alien Quarso - modified Kemurian suit
Rigger - modified Dinosaur Tank suit with Woo roar
Nurse - altered Ebirah roar
Alien Shaplay's shadow illusion - Alien Godola suit with parts from Alien Pedan
Robot Ultraseven - modified Ultraseven suit