Looking for a growth hacking consultant/resource

Our startup serves a relatively niche market. We've worked with several marketing/funnel consultants who have tried to increase our lead gen/help with conversions/build some marketing automation, but their lack of understanding of our market and the difficulty in targeting leads have led to a complete lack of success. The last two consultants we've interviewed have told us that they simply can't hit our goals. We've realized that it's too difficult to teach consultants about our market, so we want to try and bring in some of the skills that we're lacking.

Things we need help with:

- Understanding our lead pipeline, where we're successful and where we're weak. - Knowing how/when to reengage warm leads and how to identify potential conversations rather than shotgunning money. - Looking at our 4+ years of marketing/conversation data and trying to learn some things about it. - Developing the skills to maintain our marketing funnels in a more healthy/robust way, rather than just kind of winging it.

Very interested in online resources/texts/courses that can help educate us on this, but we're also interested in building a relationship with a growth/marketing consultant who can bring their expertise, strategies, and tactics to the table.