One thing that you must not forget here is that the Ring did have a will of its own. We see Gollum seeing a wheel of fire on Mount Doom and hears the Ring speak. So clearly it could and would use the bearer to fulfill its needs.
Quote:
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‘Begone, and trouble me no more! If you touch me ever again, you shall be cast yourself into the Fire of Doom.’
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So the Ring could, depending on the need, exert a stronger or weaker force over the bearer. For example it might have tricked Bilbo into thinking it was a good thing so as to escape from the Misty Mountains, but later tried to slowly wear him down and make him a wraith.
Fortunately, he proved to be quite resilient.