Ask ChatGPT. Prompts asking it do research about people who could be creators in your industry. Ask it to analyze your competitors and see if they've used any influencers.
Use SparkToro. Free tool for up to five searches per month. It's good not great. Better for some industries.
Search LinkedIn. Simple titles and levels in the search and you'll find some people. Look at quality of their content and recent followers. Spend the time to do the thorough research.
Find Podcasts. Find the podcasts in your industry and see who are the hosts and their recent guests.
Identify Customers. Look at your most engaged and happy customers and see if some of them might want to do some influencer marekting or might already be doing some.