Comparisons between Blake and Tolkien are tempting, not least because of superficial resemblances, but more valid comparisons can be made in their treatment of similar underlying themes. One such is that shown in the opposition of Los and his Spectre (Blake) and of Frodo and Gollum (Tolkien), where a comparison points up the outlooks and limitations of both writers.
Noad, Charles E.
"Frodo and his Spectre: Blakean Resonances in Tolkien,"
Mythlore: A Journal of J.R.R. Tolkien, C.S. Lewis, Charles Williams, and Mythopoeic Literature: Vol. 21
, Article 12.
Available at: https://dc.swosu.edu/mythlore/vol21/iss2/12