It's your job to think about it too much!
I'm not all that keen on first names and last names beginning with the same letter - so that would discount Lucy and Lizzie for me.
I know what you mean about 'Is a Bell Loose', though.
And the other problem with Tess (apart from it sounding like it's short for something and not liking the something it's short for) is the 'S' sound at the end of it and the 'S' sound at the end of your surname - though that might not be a problem for you (and you might not have thought of it - sorry if you hadn't).
Are there any other derivatives of Elizabeth that you like/could think about using?