Chandelier installation and switch wiring
The key for you will be finding a double switch that has a 3 way and a one way, seeing as you want to eliminate the need for changing out your box - assumption here is that you have an existing installation with drywall already in place. 
There is another factor at play though - NEC CODE requirements for how many wires you can put into that existing box. - How much space - you can't just stuff more wires just because you might have a wire hole to feed them into.

However installing a bigger box is really not that hard in this situation as some newer boxes have the box mounting screws internally - not on the outside where it would be difficult to mount in an existing installation (and yes they are screws - quite nifty for about $3.00 USA). 

Your wiring might look something like this below. 



Below you will find an example of the SMART box by Madison Electric

In your situation this makes perfect sense to use.}
The Tabs for studs - if you don't need / use them they are removable...