Related company (or multiple relations between persons and company)
I sell display advertising: the are media agency ("company") planning the media purchases of clients ("company") through persons (employee) so it would be important to keep everything together.
There are also brand owned by a group, with many digital media manager but just one media agency...
Zoltán Lehóczky commented
This declined idea of mine was very similar: https://futuresimple.uservoice.com/forums/109313-base-ideas/suggestions/6049152-be-able-to-add-related-contacts-e-g-works-wit
Basically I'd like to see the ability to build a graph of contacts. We need a way (instead of using descriptions as currently) to have arbitrarily labelled connections between contacts in addition to the usual employer-employee relations. For example: referred by, knows, works with... And also being able to connect a single person to multiple companies like OP suggesting.