I think the transfortmative power of the twentieth century can hardly be overestimated. A successful 1905 revolution might be ernough, unless your standard of democracy and human rights is Scandinavia or somesuch. If the revolution somehow produces as reasonably stable and reasonably democratic Russia (and the chances were not that bad), the country cannot help being economically influential (all the natural resources plus an industrial base worth mentioning) and powerful (huge army, huge territory, naval bases on three seas). A fortuitously timed heart attack felling Nicholas II might be enough, leaving Mikhail to rule. He'd treat the Duma differently. He might even be smart enough not to get sucked into WWI. Imagine what not fighting that war could do for Russia: The Germans would still bleed every baby step on the way to Paris, and the Russians would sell them grain, cloth, iron, copper, oil and whatever else they'd need. By the end of the war, Russia might well end up holding a huge stake in German government bonds and pretty much all of Berlin's former gold reserves. Allied bonds, too, for good measure. And since that development might well see the Ottoman Empire non-belligerent, too, Russia could subsequently agree with other powers on a carve-up of its remaining surplus territories, so to speak. I don't think it would work, but it would be more worth fighting than WWI, and Germany would be so exhausted they wouldn't be able to prevent it even if they wanted to.
That leaves the problem of Poland, since in order to have its current borders, the boundaries would somehow have to be rolled back a bit. Dunno, some kind of nationalist revolt maybe, but they can't enforce the old borders of the Kingdom of Poland?