Does anybody know any FCOM compatible quest mods that are among the greatest?

Pretty much all quest mods are FCOM compatible. The only exceptions being the ones that are http://www.uesp.net/wiki/Tes4Mod:FCOM or are in general not OOO compatible. Which really isn't all that much.

This totally could have been asked in the FCOM thread and even some basic use of the search engine would yield a lot of results.

The http://www.gamesas.com/index.php?/topic/1010109-list-list-of-mod-lists/.

http://www.gamesas.com/index.php?showtopic=1072579 of the numerous threads started like this one. Look at azerquest section.

Most start with http://knol.google.com/k/toql-the-oblivion-quest-list# ... though it is showing its age.