The sermon entitled The Consuming Fire by George MacDonald seems to not only suggest universal salvation, but also be in keeping with Eastern Orthodox theology. I find it fascinating and uplifting. I imagine he is a popular writer on this forum.
You’re right! For a number of us, GMac is the MAN!
His “Diary of An Old Soul” is one of my favs, with a few of the fantasies (and Phantases) following close behind.
You’re also correct in assessing him as a Universalist.