Just so you're aware - going from the stock 27 inch to a 29 inch will give you only 1 (one) inch of lift - yes, the tire is two inches larger, but only one inch of that is between the axle and the ground.
The answer to your question MAY depend on the type of suspension lift, stiffer lift springs reduce the degree of roll caused by the raised center of gravity.
Based on personal experience, with a good suspension lift, you're more likely to be bothered by the instability caused by the additional sidewall flex of the taller tire than that caused by the rise in the center of gravity. I'm running Old Man Emu springs & shocks with 235/70R16 tires (28.95" - so close enough to 29" that it makes no difference) mounted on the OEM alloys and no wheel spacers. When the lift was installed (I did it myself in my driveway) I continued to use the stock size 235/60R16 tires and despite the raised center of gravity, the vehicle had less roll and was more stable, when I fitted taller tires, the increase in sidewall flex was noticeable, to the point I was not comfortable, but I have gotten accustomed to it.
Oh - you don't need a two inch lift to clear 29's the OME springs give around 30mm, which I have found to be enough, you may need to trim the back edge of the front bumper and the inner fenderwell plastics to prevent rubbing when turning - also - you can expect the tires to rub on the frame when on full lock, and no, more lift won't fix these issues.
