1. Lava Reef Zone (Act 1) - Sonic & Knuckles

2. IceCap Zone - Sonic 3

3. N. Gin Boss theme - Crash Bandicoot 2

4. Upper Brinstar - Super Metroid

5. Ridley's Lair - Super Metroid

6. Metropolis Zone - Sonic 2

7. Mystic Cave Zone - Sonic 2

8. Final Boss theme - Sonic 3

9. Main Boss theme - Ninja Gaiden 2

10. Gene Gadget Zone - Sonic 3D Blast

I'd say Errol and Count Veagar from the Jak series

Next up would be Revolver Ocelot from Metal Gear Solid