Two others I can think of offhand that have Marvel staffers as characters in the stories are FANTASTIC FOUR 176, and MARVEL TWO-IN-ONE 60, both illustrated by George Perez and fun issues, that both include the Impossible Man (Marvel's version of Bat-Mite).

Issue 60 is beautifully inked by Gene Day, with Mark Gruenwald, Ralph Macchio and George Perez attending a party that is interrupted by a slugfest between the Thing and threats created by the Impossible man. The story also sports a really fun scene I mentioned earlier in the topic, with the Thing taking a shower, that re-enacts the famous shower scene in the Alfred Hitchcock's movie Psycho.