I find working with constraints to be helpful. That's why, although it can be frustrating, one of the things that is helpful for me when designing my printable templates is the fact that I am limited to using only certain fonts. They have to be copyright free as well as contain a non-English character set with characters for letters like ö,ß,ø,ñ etc.
That's why I'm always glad when I discover fonts like Latin Modern Roman. This traditional font comes in six different styles with at least one different weight for each (roman, italic, bold or oblique.) It's easy to create a dynamic looking layout with just one typeface.
Take a look:
See it in action on my 'Flourish' black and white printable wedding invitation.
You can download it for free here.