I have to agree with Hymirl and say that your list doesn't look very good. It's not because it has a low model count; it's just that there's not a whole lot too it. Even if you're trying to make a low model count army like Deathwing, you still want to include units that can pick up some slack in other parts of the list.
Deathwing armies that do well generally have a Ravenwing element to them as well. I know a guy who plays his deathwing army with three terminator squads, a scout bike squad, a land speeder and a whirlwind tank, and from what I've heard he does very well with them.
Also, low model count armies only do well because they're paired with some kind of gimmick to them. For instance, Deathwing armies have a rule that makes their terminators Scoring, and they also get a special type of deep strike that allows most of their terminators to come in on the first turn. The Sanguinary Guard list has something similar, in that they're also turned into troops and they too have special deep striking rules.
I fooled around and made a Dante list the other day. I can't remember the points costs but it was something like
1x Dante
3x Sangiunary Guard (PFist, Infernos Pistol, Death Masks)
1x Stormraven Gunship
1x Baal Predator
The two vehicles are necessary to the list because they provide support to the infantry. To play the list you'd have to pick one side of the enemy line and hit it with all that you had. The rest of your opponents army would mostly be left unable to engage until you were ready for them, otherwise you would get picked apart too fast.
I can tell you for a fact that the Woof Guard list doesn't work, only because I've slaughtered it about 5 times already (you weren't the first one to come up with the idea trust me, and you won't be the last). It basically suffers because it doesn't have any gimmicks to it that allow it to make up for its low model count, and Terminators are actually pretty easy to pick off if you lay down enough fire on them.
EDIT: I changed my mind about the Woof Guard list. I'm not going to say it can never work, it's just that I've never seen a player take the right approach to it. If you were to split up your Guard into smaller groups (as opposed to two really big ones), give them some better ranged capacity (most players I've fought only give them a single assault cannon, and the rest have frost weapons and thunder hammers), and then give them some way to close on the enemy line (like mounting a group in a Drop Pod), then it MIGHT work, but you'd definitely have to try, and Logan would definitely have to pull his weight around the table.