As an adjective idealist
is .
As a noun ideologue is
ideologue, ideologist.
idealist
English
Noun
(
en noun)
(philosophy) One who adheres to idealism.
Someone whose conduct stems from idealism rather than from practicality.
An unrealistic or impractical visionary.
Related terms
* idea
* idealism
Derived terms
* idealistic
* idealistically
References
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ideologue
English
Alternative forms
* ideolog
Noun
(
en noun)
A person advocating some ideology, especially as an official or the most eminent advocate.