For the lowballers, sure.
Absolutely not. Nothing Tenebrous has done supersedes the likes of Dooku, honestly. Let alone putting him above the likes of Revan and Vitiate.
Not really...[snip]
Nova, sweetie, you miss my point; both Cognus and Tenebrous suffer from lack of showings and depend solely on power scaling, and power scaling alone in battles threads to determine whether of they beat "X" character.
While their situation obviously isn't perfectly identical since Tenebrous is solidly above Bane, while Cognus doesn't really have to be by much, they still suffer from the same problem when you strip that from the equation: showings mean shit for them, while scaling is the only thing.