Saint Michael, the patron saint, who protects law enforcement officers. I worked with police in a therapeutic capacity for 22 years and know the dangers they face everyday. It's a miracle that we don't hear of more tragedies that befall them. I believe that for some it's prayer, their faith, and the protection they receive daily from God and St. Michael watching over them.
St Cosmas & Damian, the twin brothers that refused to accept money for the physician practices they performed. They were arrested and tortured, but stayed true to their faith. After being hung on a cross, stoned and shot by arrows, they were later killed by beheading.
I am not christian particularly, I am not not christian either. I'm technically Pagan, however that level of sacrifice for your beliefs and the refusal to be bullied out of them is worthy of absolute admiration.
My favorite is St. Francis of Assisi. He was a man who chose poverty- to live in devotion to God and the spread of His word among ordinary people.. In nature and among the animals, he felt especially close to the Lord and his wondrous creations. I can really relate to these principles. Although I don't live in poverty, I prefer a simple life in which I am not distracted by excess.