Compassion is the most altruistic form of love.

I also think that someone is sure to use it for selfish and not purely altruistic ends.

I am an altruist.

Peter was an altruistic video game player; he would give items to people who needed them, rather than selling them for personal profit.

Tom is altruistic.

Tom is an altruistic person.

She was impressed with the altruistic service of nurses.