I'm going on a hunch here, I assume both of those items are from Halo? The UNSC Infinity is 3.5km, roughly 1.5km longer than Harbinger at 2km. The Covenant Assault Carrier is 5.35km, roughly 3.35km larger than Harbinger. So both of those are bigger than anything on this graph, yes.
It isn't accurate. I said previously that I would be updating it (and the other two).
If you're talking about the third from the bottom, it appears at the end of the game if you choose to keep the Collector base, but it doesn't have any textures (as seen here). The plan is to size up all the possible ships and vehicles that I can find. Even if they don't necessarily appear in the game to any great extent .
Harbinger is probably just over 2 KM, and an Alliance dreadnought is about 800 to 900 meters long. Thus, I think your scales for the Turian and Alliance cruisers are wrong. They should be about 500 m long, i.e. roughly 1/4 of Harbinger's length. Sovereign dwarfed the Normandy SR-1.
it also includes a ship that . . . to my knowledge was only in the comics
If you're talking about the third from the bottom, it appears at the end of the game if you choose to keep the Collector base, but it doesn't have any textures (as seen here). The plan is to size up all the possible ships and vehicles that I can find. Even if they don't necessarily appear in the game to any great extent
Harbinger is probably just over 2 KM, and an Alliance dreadnought is about 800 to 900 meters long. Thus, I think your scales for the Turian and Alliance cruisers are wrong. They should be about 500 m long, i.e. roughly 1/4 of Harbinger's length. Sovereign dwarfed the Normandy SR-1.