This is fun. I was hoping Dave had mudcat's perhaps first tripartite personality (Dave? Dave's not here. No this is Dave) but I figured Wolfgang's was the answer.

Aggenda. Bobert could spell it that way. So could I. But he couldn't spell the rest of the sentence so well. I could. But it wasn't me.

Aggrandizement/aggrandizer? No, not helpful. That's everybody here.

Wait wait don't tell me.