Actor vs. Self in Space Ghost Coast to Coast

If you're not familiar with the show, basically guests are interviewed (badly) for the show, but then clips from the interview are taken totally out of context and often just used to provide a structure to the show. The questions are changed, and a lot of what gets used from the interviews is just awkward pauses, the guest being rudely interrupted, and confused stares. Nobody walks away feeling like they learned anything substantial about the guest, because that's not the point.

Early on, guests had no idea what the nature of the show was and gave genuine interviews, but pretty quickly word got around and many started leaning into the role of "guest". For example, Robin Leach's interview was fairly straightforward until the end, when he announces that he is "Zoltran", turns green and shoots lasers from his eyes. William Shatner gives a humorous but generally straightforward-sounding interview, but also treats the characters on the show as if they're completely real, at one point sincerely asking "Zorak, didn't you and I fight to the death?"

So, are these Self, or a fictionalized self?

Most of the guest credits are currently set to Self, but there are a lot of inconsistencies and gray areas:

Lassie is credited as Lassie instead of Self, but just sits there being Lassie. (Probably the straightest interview the show had.)

Al Roker is standard Al Roker, but in an ad for brain shampoo.

Mujibur and Serajul of David Letterman fame are credited separately under their full names, but are clearly doing a scripted bit.

Captain and Tennille are credited as such on the show, but IMDB lists them separately: Daryl Dragon as The Captain and Toni Tennille as Self.

Elvira does a guest spot in character and is listed as Elvira in the credits, but IMDB has it as Cassandra Peterson as Elvira. (Should (as Elvira) be added as an attribute?)

Red Green appears dressed in character, only says one line that isn't clearly in or out of character, is credited as Red Green in the credits, but Steve Smith as Red Green on IMDB.

Two of the American Gladiators are on in costume, introduced as "Ice" and "Tower",  but give the interview completely OOC, and are listed only by their real names in the show credits; on IMDB, they're credited as the characters Ice and Tower instead of Self.

And Carrot Top, very much in character, is credited as just Carrot Top on the show, but as Scott 'Carrot Top' Thompson as Self on IMDB.

So the show is a complete Cartesian nightmare, obliterating the line between "self" and "character", leaving us to untangle this mess. Some of these just make no sense to credit as Self -- I think it'd be easier to argue that none of them should be. Some might have been themselves when originally interviewed, but definitely wouldn't behave that way if what we see in the episode was the actual interview they had. Some are reacting as themselves to a situation they know is fictitious. We definitely can't say they're all Self because some are playing characters, albeit characters that existed outside the show. And any line we set between the two is going to be arbitrary.