As a practicing United Methodist, I would be committing heresy to not acknowledge Charles Wesley as the greatest writer of hymn lyrics ever--he wrote more than 6500 hymns, most of which had 6 or more verses, a feat not even approached by anyone else (to my knowledge). Quite a few of his hymns are usually in lists of "favorite" hymns, too, so there must be some merit there.
For hymn tunes, I have several ideas: (1) just about anything in the Welsh tune heritage; (2) William H. Doane (who set a lot of Fanny J. Crosby's words to music); George Frederick Handel; Hans Leo Hassler; and Lowell Mason all come to mind.
David