Ok, You're very close.
In your Create HTML table, under Owner, you want to clear that one out and grab the Full Name field from the "Get Record" step and that will get you the correct field...but...
How stuck are you on the HTML table (can it be Excel, for example?) and how averse to 'code' are you? Here's why I ask:
I think the rows need to be updated with the Full Name one by one inside the Apply to Each window. Which means you'll need to either create a table or array-like variable in the beginning and then append to it as your Flow updates the GUID with the more-readable Full Name. You can't append to an HTML table, but if you're comfortable with a mild level of code, we can initialize an array in the beginning, and then append to that inside the Apply to Each.
If you're code-averse like me, we can probably update a table inside Excel, then dump that thing into an HTML table to email out, and then clear it so it's ready for the next run of the Flow. Let me know if that makes sense and/or what your preference is.
-Ed-
