Best Integrations for Enriching B2B Leads in Clay

If i have a very well defined list of logos / targets in clay and I want to go through the process of enriching it with leads (people and titles at the targets), their profiles, AND their contact info (linkedin, email, phone numbers) then make sure the contact info is validated, which integrations into clay are the best ones to use. I am dealing strickly with enterprise b2b. Thank you