Do you have any opinions on something like:
# Default fonts:
#
# If FLTK2 has been configured with Xft enabled (the default), you can
# use scalable fonts such as DejaVu or Liberation (try running "fc-list").
#font_serif="DejaVu Serif"
#font_sans_serif="DejaVu Sans"
#font_cursive="URW Chancery L"
#font_fantasy="DejaVu Sans"
#font_monospace="DejaVu Sans Mono"
#
# Otherwise, use bitmapped fonts like the following (for a list, try running
# "xlsfonts -fn *-iso10646-1 | grep -v -e -0-0 | cut -d - -f 3 | sort | uniq").
# font_serif="times"
# font_sans_serif="helvetica"
# font_cursive="helvetica"
# font_fantasy="helvetica"
# font_monospace="courier"
If there's a nicer way to get the second list, that would be, well, nice :)