Consistent Font Families?

One of the first changes I felt necessary was to make all the font families consistent. Code below is excerpted from latest style.css. IMO it is a “ransom note” style, where lots of fonts are used and no clear style is conveyed. IIRC, even though you provide 3 blanks to enter a font, it doesn’t cover all these cases. Please consider making these consistent. Even the two fixed-width styles are different. Thanks

body{font-family:georgia,'times new roman',times,serif;}
h1, h2, h3, h4, h5, h6{font-family:'Open Sans',helvetica,arial,sans-serif;}
.entry-content ul, .entry-content ol, .comment-content ul, .comment-content ol{font-family:helvetica,arial,sans-serif;}
input, textarea{font-family:arial,sans-serif;}
nav ul li a{display:inline-block;font-family:'lucida grande',helvetica,arial,verdana,sans-serif;}
#site-title a, #site-title h1 a, #site-title h1{font-family:helvetica,arial,sans-serif;}
.bbPress .bbp-forum-title, .bbPress .bbp-topic-title, .bbPress .bbp-reply-title, .bbpress .bbp-forum-title, .bbpress .bbp-topic-title, .bbpress .bbp-reply-title{font-family:'Open Sans',helvetica,arial,sans-serif;}
.bbPress .forum-titles li, .bbpress .forum-titles li{font-family:helvetica,arial,sans-serif;}

tt{font-family:courier;}
code{font-family:'courier new',courier,serif;}