Is there a particular historical philosopher or person who can be said
to have invented the concept of God?

In an athiestic view, the concept of God was almost certainly around
before we have records of written history.

In a Christian/Jewish view, God invented the concept of man.  But if
you must attribute God to a man then Adam had the first thoughts of
God.

Which god? Zues?

Throughout recorded history, there were always gods -  Before
monotheism there were gods for everything from growing vegtables to to
good luck.   Do you want to know the start of monotheism (ie just one
god) or the term god itself.  There might be some history about the
start of monotheism, but the term or meaning of "god" has been around
since before we really have any significant historical records.

no there is no particular istorical or a person who can be said to
have invented the concept of god,it is just very simple that people
have experienced some miracles happening to them but they had no idea
who was acctually behind them but they also wanted to give a name to
that superpower so atlast with the help of some knowledgible people
they themselves invented the concept of worship and god.!!!......

Probably Bacchus after imbibing the dew.