The answer to this question in the Bible is
yes and no!
Yes, many have seen him.
Genesis 12:7 The Lord appeared to Abram and
said, “To your descendants I will give this land.” So he built can altar there
to the Lord who had appeared to him.
Gen. 18:1 Now the LORD appeared to him by
the oaks of Mamre, while he was sitting at the tent door in the heat of the
day.”