While I haven't read "The End of the Affair," "The Power and The Glory" is, to me, a full masterpiece if ever there was one.
Here's how I would rank the Greene I've read:
The Power and the Glory
The End of the Affair
The Honorary Consul
The Quiet American
A few of the short stories.
Journey Without Maps
But I haven't read enough Greene. A Christmas resolution! While in college the idea occurred to me to go to Havana and interview any prostitutes who might have slept with GG, perhaps for an article. Or a coffeetable book, with photographs - Nos Jodio El Capitain. But like so many of my undergraduate ideas this one remained unfulfilled. I wonder what insights they might've offered me. And I them.