Harold Ramis, who passed away today at the age of 69, left behind a treasure trove of comedic gems. As the writer and director of such revered classics as "Caddyshack" and "Groundhog Day," Ramis's behind-the-scenes comedic impact will forever be guffawed upon. But it was as an actor that many of us first came to recognize the man's immense talent.

Ramis was known for playing it straight while letting co-stars like Bill Murray and Dan Akroyd take many of the biggest laughs. Many, but certainly not all. As our roundup below surely shows, playing it straight, when done well, can make for some serious laughs.

[Related: Harold Ramis's 14 Greatest Contributions to Hollywood]

1. Dr. Egon Spengler in "Ghostbusters" (1984)

2. Russell Ziskey in "Stripes" (1981)

3. Neurologist in "Groundhog Day" (1993)

Neurologist: "You know what you may need Mr. Connors?"

Phil (Bill Murray): "A biopsy?"

Neurologist: "A psychiatrist."

[Related: Harold Ramis, Star of 'Ghostbusters,' Director of 'Caddyshack,' Dies at 69]

4. Ben's Dad in "Knocked Up" (2007)

5. L'Chaim in "Walk Hard: The Dewey Cox Story" (2007)

6. Don Durkett in "Orange County" (2002)

7. Dr. Egon Spengler in "Ghostbusters II" (1989)

8. Russell Ziskey in "Stripes" (1981)

9. Dr. Egon Spengler in "Ghostbusters" (1984)

[Related: What Does Harold Ramis's Death Mean for 'Ghostbusters 3'?]

Follow me on Twitter (@AdPoc)