I don't know why I'm rating the datability of Lovecraft's men, but here goes
Herbert West: Good-looking and well-employed. A misogynist if you go by the movie, but not in the original story (or A Shoggoth on the Roof.) If his repeated attempts to find a fresh enough corpse are any indication, would not give up just because the relationship hits a rough patch.
The guy from Shadow Over Innsmouth: Based on how much time he spends describing the ugly Innsmouth people in a fascinated manner before he just gives up and chases after them, I think he might be Deep One-sexual. Sorry.
Wilbur Whateley: Ugh. Ugh ugh UGH.
Randolph Carter: I'm trying to think of a pun based on the word "dreamy" and should probably quit while I'm ahead.
Arthur Jermyn: Would probably kill himself, you and any resulting children if he found out one of his ancestors was Polish. Do not date.
Charles Dexter Ward: Kind of cute in a dorky way, but could be replaced by his creepy grandfather at any moment.
Nyarlathotep: Based partly on Tesla, so he might be celibate, but can still show people a good time. Likes to go dancing with witches and take vacations to Kadath. I picture him looking like Morpheus in The Matrix, so I'd probably date him.
Yog-Sothoth: As good a husband as you can find this side of Aylesbury; and if you knew as much about the hills as I do, you wouldn't ask for no better church wedding than his.