big-hearted 
adjective
(Of a person or action) kind and generous: the big-hearted bunch have decided to donate their winnings to a local charity...
- Thanks to the amazing generosity of various big-hearted members of the Foolish community, clicking here and then on ‘Recommend it!’
- And then there's the big-hearted driver, Bela and a mysterious girl in a bear suit.
- It's strange really, but when we arrange these types of things it's usually the big looking bikers who turn out to help they're big-hearted people.
Synonyms
generous, magnanimous, munificent, open-handed, bountiful, free-handed, generous to a fault, ungrudging, unstinting, charitable, philanthropic, benevolent, beneficent;
kind, kindly, kind-hearted, unselfish, altruistic, selfless
literary bounteous