Hi @Jsharkey
"when a file is created" Action trigger for each file, i would suggest you to use Schedule Flow and run it for every 30 min(You can change the running schedule as per your need).
In this you get all items from SharePoint and group files by created by and send one email.
Because schedule flow will look entire library you need to add one extra column in library called "EmailSent" (Yes/No) keep this default as NO and after sent email set it to YES.
Let me know if you need further assistance.
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