1) Idea person 
`Imaginer` (to imagine) is a French-language song first performed and recorded by American singer Jackie Evancho in 2011. The song uses the music from a 1999 English-language song, `Broken Vow`, by Walter Afanasieff and Lara Fabian. The same songwriters wrote the new French lyrics for Evancho, who recorded it on her 2011 gold album Dream With ...
• (n.) One who forms ideas or conceptions; one who contrives.
Im·ag'in·er noun One who forms ideas or conceptions; one who contrives. Bacon. 
imaginer Other 'image' words: icono-, eido-.