Humble fellow, but he had plenty (5)

I believe the answer is:
helot
'humble fellow' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'he had plenty' is the wordplay.
'had plenty' becomes 'lot' (I can't justify this - if you can you should believe this answer much more).
'he'+'lot'='HELOT'
'but' acts as a link.
Can you help me to learn more?
(Other definitions for helot that I've seen before include "downtrodden?" , "Spartan serf" , "He's bound to land" , "One made to work" , "Hotel (anag) - serf" .)
