Could you narrow down your interests a teeny tiny bit? "History" is a bit broad.

Also not finding academic sources for a topic might be due to how/where you're looking. It's unlikely that a topic (any topic) you can think of doesn't have any academic sources at all. Perhaps it's better to ask for help looking for sources rather than looking for a topic with 'plenty' of sources (too many sources can be a problem too...).

This submission has been removed because it violates the rule on poll-type questions. These poll-type questions do not lend themselves to answers with a firm foundation in sources and research, and the resulting threads usually turn into monsters with enormous speculation and little focussed discussion. “Most”, “least”, "best" and "worst" questions usually lead to vague, subjective, and speculative answers.

For questions of these types, we ask that you redirect them to more appropriate subreddits, such as /r/history or /r/askhistory.