I only read Beowulf the monsters and the critics and I really loved it. I don't know that Tolkien could make that many references to dragons. I have read Beowulf myself and I kinda enjoyed the poem. Loved to read his views on it.
This paper helps explain Beowulf as a work of art, and how some of the more puzzling bits, including those that other critics had labeled confused or inept, actually skillfully help create the intended atmosphere of the poem. As a casual reader who'd just read Beowulf for the first time, I found it tough going at times, and he assumes his readers are fluent in both Old English and Norse.
This is an academic text that focuses on Tolkien's lecture about Beowulf. This book along with "Monsters and Critics" is credited with being one of the best and possible the first in describing the way to perform critical analysis on literature. It is a little hard to follow but if you are interested in Beowulf and critical review than this is well worth the time required.