You guys are harsh.
Harold Ramis, while not as well known to moviegoers as Bill Murray, is known throughout Hollywood for bringing some of the best comedies Hollywood has seen in the past 30 years to life.
Animal House, Vacation, Caddyshack, Ghostbusters, Stripes, Groundhog Day all saw him involved in some way, writing, directing and/or acting. And by those who have seen his great roles in Ghostbusters AND Stripes, as well as SCTV before that, they know he is a great comedic actor.
Dan Aykroyd is a highly respected actor who thrives on being remembered as Elwood Blues, but impresses audiences with his amazing versatility in many differing roles. For this, he is known as one of the better actors to come out of Canada…ever.
Bill Murray is a funny guy. Period. He has been in few movies that saw him too dramatic. I've heard differing tidbits about him over the years. I know that he is an easygoing guy and friendly and charming in real life. On some sets he has been known to be a little tense at times, but to say that he is only known for Ghostbusters is almost being too full of your own favorite movie. He is remembered by many in Ghostbusters as well as Caddyshack, Stripes, Groundhog Day, Scrooged (hit or miss for some, but fans of his humor enjoyed it), What About Bob? (loved by many), and in 1998, while not an enormous commercial success, Rushmore was an incredible Dramatic/Comedy Performance that defined him as an actor. He was the highlight of Charlie's Angels and just another great actor in The Royal Tennenbaums. Just recently, he and Sigourney Weaver starred in a play together in New York about 9/11 and the aftermath, and I believe it was a drama. He isn't starring in it anymore, but was the first to play one of the starring roles in what will be a rotating cast.
Ernie Hudson? How about Ernie Hudson is one of the best versatile actors in Hollywood, and better than 80% of the actors out there. He can play any role you give him, and generally chooses good films. There was a reason he was chosen as the 4th Ghostbuster: he's extremely talented. And he's had roles in MANY films, a lot over the years, although I'm not exactly sure how many.
So before you go bashing these actors, take a look at the many more successes in their career than they have had failures. Bill, Dan, and Harold are associated with being some of the best comedians and comedic actors of the past 30 years. And Ernie Hudson is an incredible actor.
That's all I have to say.