I only just read the title, and try to answer.
Have any notable Buddhists commented on Krishnamurti's teachings?
I think Jiddu Krishnamurti (not U. G.) is not particularly being concerned by any Buddhist. If you don't ask this question, this is not really a dish that's waiting to be served. This dish may even not exist.
From past material I read, he was "chosen" by the Theosophical Society and groomed to be a spiritual leader, later he rebelled. Theosophical Society one of the founders was Helena Blavatsky who had learnt something from the Tibetan Lama, thus formulated her theory about the 5/7(?) races, the Atlanteans, Lemurians... and the Aryans are the supreme race... her theory later was adopted by Hitler... then we will have to go on analyzing the hands playing in the dark under the table, the world history and wars how these happened... OK. Pause.
According to @sandeepani:
The Theosophical Society has helped the
reviving of Buddhism greatly during the British Colonial Era in Sri Lanka and elsewhere. But their teachings were somewhat different still (a lot of mythical interest and combining religions), which caused many Buddhist members to leave it in later years.
If you are seeking to nourish your spirit, your inner life, my advice is to seek pure, pristine teachings from great teachers.