A very userful file can be viewed here:
Fonts Supporting Polytonic Unicode Greek
There’s a file that shows in a better resolution a lot of greek fonts, with practical examples. The file has 4 pages, of these pages i had take the screenshots that are at next:
The observations about the fonts marked with *, or + or ‡ are:
* One of my favorites.
+ Has some bugs such as compatibility with other fonts. Switching to this font from another font may not work for some characters.
‡ Requires that diacriticals be typed before the letter with which they belong rather than after. It also requires the use of a special keyboard like the Tyndale keyboard. These fonts will not work with the Logos keyboard. However, the Tyndale keyboard will work with either kind of font.
+ Has some bugs such as compatibility with other fonts. Switching to this font from another font may not work for some characters.
‡ Requires that diacriticals be typed before the letter with which they belong rather than after. It also requires the use of a special keyboard like the Tyndale keyboard. These fonts will not work with the Logos keyboard. However, the Tyndale keyboard will work with either kind of font.