Accurate Headcount by Role: Tips for Finding SDRs/BDRs/MDRs

Hey Clay team, what's the most accurate way to find headcount by role, specifically I'm looking for SDRs/BDRs/MDRs etc. I've seen the rolecount enrichment won't pull closed roles, I've tried that and it misses quite a bit, this is my primary qualification for accounts. I've tried Datagma, but still doesn't seem to be pulling the correct amount. If the Answer is also, pull with apify or phatombuster, lmk 🙂