Golan Trevize is the protagonist in Foundation's Edge and Foundation and Earth.

This article, Golan Trevize, contains spoilers. Be forewarned, plot and/or ending details follow.
Asimov says you decide.
Golan Trevize en los mundos espaciales en ruinas, por Michael Whelan

Golan Trevize on a huge statue of a long-lost civilization

Golan is a Foundation councilman in the First Foundation's ruling Council, about five hundred years after the breakup of the First Galactic Empire. He holds the true but unpopular view that the Second Foundation still exists. He openly questions the validity of the Seldon Plan, and even questions the authenticity of a Seldon recording that seems to coincide exactly with reality. As a result, he is arrested by the then-mayor of Terminus and exiled into space, supposedly to search for the still-active Second Foundation along with Janov Pelorat. Pelorat finds a woman called Bliss on the living and conscious planet Gaia. Trevize discovers that he must decide the fate of the galaxy. He decides for a galaxy controlled by Gaia, due to his intuition and because he understands that Gaia's slow processes would allow him to change his decision, but the core reason is still unclear to him despite him being firm in his choice.[1]

The true reason he chose Gaia is that Daneel manipulated events such that an intergalactic invasion by aliens is prevented through a galaxy united by Galaxia.[2]