Need Help Finding Similar Clients for Company Enrichment

Dear Support, can you please help me in this regard? I'd like to enrich a company with their clients, in order to find similiar clients (via Ocean.io for example) or even better the biggest enterprise clients in their target group. I've already tried via claygen but the results weren't quite promising, also I haven't found any enrichment for that use case. As input I have the company domain & name. Do you have a recommendation for that use case? Thanks!