Setting Up an Effective Allbound/Outbound Lead Process: Tools & Strategies

Hi guys, we want to set up an ambitious allbound / outbound process and I would like to pick your brain if you have ever seen anything in that direction / know good tools that could help to make the process work. We often get inbound leads from large companies and might not reach / close the lead. However, other people in the company, their bosses etc might be interested so it would be worth to contact the next best decision maker until we come to a close / hard no. The main challenge would be to come up with a prioritised list of other potential decision makers that are close to the initial lead so we can reference them. Apollo people search would be one starting point. Also, I was checking Clay's native "Find People from Company" feature, but as I cannot input variables into the search elements like location & job title (right?), the feature would not be too helpful Do you have any other ideas, ideally also for workflows that do not require manual search of people on a similar hierarchy and best case also not only depending on LinkedIn? Thank you!!