I make rugelach, too. They're my favorite cookie. Now, for cutting them, long ago I started using an adjustable pastry ring for the circle, and inside, a pie cutter that cuts them in 8 slices, and then I move the pie cutter to get 16 perfectly sized slices in the dough.
They're easy to make, but they're labor intensive for people who haven't made them before. I've gotten friends to make them and they've had a bad time with the dough, even after putting it in the fridge. So practice before you make them! Once you get the hang of it, they're fast to make.
These are my tools, if you ever want to try it that way.
BUT, there's a book of recipes I want to recommend for easy-to-make, delicious cookies that can be used for weddings. One Girl Cookies (in Brooklyn) have made cookies for a lot of events, including an associate editor at Martha Stewart Weddings. Her recipes work flawlessly (even for people who never baked before).
This is their website. I love their orange butter drops with shredded coconut.