10. Sikorsky R-4. What started it all.
9. Piasecki HRP-1. First tandem rotor, proved that it would be viable for the military.
8. MI-26 - ungodly amount of lift...
7. TH-57 - Trains everyone.
6. H-53 - Pure lifting power.
5. CH-47/CH-46 - Pure staying power and versatility...
4. Mi-64. Great combination of assault support and gunship, even if it isn't as good as the Cobra/Apache.
3. AH-1W Cobra.
2. AH-64 Apache.
1. UH-1 Huey. Any doubt in your mind?
Did You mean MI-24?