On Windows my favored clipboard manager is Ditto. I suggest to have a look at it and perhaps adopt some things:
Selection-shortcut opens a history box where you not only see the current selection but also other items in the history, the current one being highlighted.
You have a shortcut to paste plain text rather than richtext.
An input field allows to search through all clipboard entries.
You can choose if to paste directly after an entry is chosen or to just change the current clipboard content.
You can control which datatypes Ditto should handle. For example you could say that it shouldn't store images.
These are the most favored options I like on Ditto.
On Windows my favored clipboard manager is Ditto. I suggest to have a look at it and perhaps adopt some things:
These are the most favored options I like on Ditto.