One solution I tried is provide multiple OG:IMAGE instances : small, medium, large, and a default image. So far so good.
<meta property="og:title" content="THE TITLE" />
<meta property="og:url" content="URL HERE" />
<meta property="og:image" content="LARGE IMAGE" />
<meta property="og:image" content="MEDIUM IMAGE" />
<meta property="og:image" content="SMALL IMAGE" />
<meta property="og:description" content="DESCRIPTION HERE" />
<meta property="og:type" content="blog" />
<meta property="og:site_name" content="SITE NAME" />