I can vouch for Gurkhas they are the bravest. They will dive in front of you to stop an attack. They will throw themselves on top of a hand grenade to save their colleagues, they will fight on with their knives when seriously wounded, they will do anything to protect you. They are World famous for their courage.
People hire them for close protection in Pakistan, Afghanistan etc. When the attackers see that you are protected by a Gurkha they will chose another target. And they are nice gentle calm people.
Hire them if in fear.