En StWebdesigner han realizado un post de 40 Inspiring High Quality Typographic Wallpapers donde las que nos parecieron mas geniales han sido estas:

CMYK Lovers

Resolution: 1900 x 1200

I love Typography

Resolution: 1920 × 1200

Alphafont 2.0

Resolution: 1280 × 1024 (I think this wallpaper can be easily created bigger using just white background)

Love Typography: A lot black

Resolution: 1680 × 1050

 

Be Yourself by nianguche

Resolution: 1600 x 900