It's easier to find an artist by their work on one-shot secondary characters than on established ones. Thus you don't want to ID the pencils here by looking at House of Secrets host Abel; the soda jerk, in both of his panels, is a typical Mo Marcus character; he looks like he fell lengthwise in a vise.
Most of the framing material in HOS under Dick Giordano's editorship follows a storyline through the introduction, the interludes if any, and into the conclusion of the issue. In #84 the intro leads into the first story but the conclusion follows a different storyline out of the last story. I believe Bill Draut pencilled for himself on the #84 intro. Since he did do full art on most of the HOS frame stories Draut's inking the Marcus conclusion in #84 and the Dick Dillin full frame in #82 does make them look at first glance like his work.
Some Dick Giordano-era House of Secrets attributions
|Oct-Nov/69||#82||[frame story]||p: Dick Dillin i: Bill Draut|
|Realer than Real||p: John Celardo i: Vince Colletta|
|Sudden Madness||p: Celardo i: Celardo? Giordano?|
|The Little Old Winemaker||w: D. J. Arneson|
|Feb-Mar/70||#84||[frame conclusion]||p: Mo Marcus i: Draut|
|Dec-Jan/71||#89||Where Dead Men Walk||w: Jack Oleck|
Jack Oleck is credited on the Direct Currents page in #89.