For some strange, convoluted reason, the earlier references to Charlton Heston made me think of Gregory Peck, another fine actor from the same era.
One of his films that always resonated with me was On The Beach in which he starred with Ava Gardner. It's a gripping, post apocalyptic yarn made in 1959. Unfortunately it doesn't seem to get shown on TV these days. Maybe the message it conveys is too relevant to the current, fragile state of world politics. Worth a watch if ever you get the opportunity.