There is no convenient way to view tasks by specific past employees. I often want to view our master project list and look for closed tasks that were assigned to or analyzed by a specific previous workspace member. However, they are not available to choose from the Assignee or Custom Field filters. I agree they should not all be visible upon first opening the menu to avoid cluttering the list, but there should be a toggle I can flip to show all previous members as selection options when applying filters. (Somewhat analogous to the "Show all Spaces" or "Show Archived" toggles.)