such important person vs such an important person

Some examples from the web:

• The most important person to keep alive is yourself.
• You're still a... an important person in my heart.
• With respect, hardly the most important person right now.
• Then you are important person for me.
• You know, I'm an important person.
• Wilhelmina Slater is the most important person at Fashion Week.
• He's the most important person in my life.
• But the coach I replaced him with became the most important person in my life.
• You're the most important person in his life.
• He's quite possibly The most important person on that crew.
• All right, I'm a semi-important person.
• You must be a very important person To warrant all that.
• I told you, I'm a very important person.
• The most important person in his life is himself.
• He's an important person to us.
• You've abducted a very important person.
• A car park attendant would never accuse an important person like you.
• I am sorry to have disturbed so many important persons.
• He say let important person wait.
• You must be an important person since you are in America now.

Some examples from the web:

• You're still a... an important person in my heart.
• Mass incarceration is such an important issue.
• You know, I'm an important person.
• He's an important person to us.
• A car park attendant would never accuse an important person like you.
• You must be an important person since you are in America now.
• He's an important person in the FBI.
• He's an important person in the FBI.
• Probably an important person there In Leningrad.
• You're not an important person to me anymore, Chang Ryul.
• I thought you were supposed to be an important person around here.
• I've moved on, 'cause I'm an important person.
• Listen, I figure on bein' an important person some day.
• And an important person, too, who's somehow one of the founders, here, of Tiahuanaco.
• You think an important person like Constance will be listed?
• An important person, from a European court, has full power over her.
• Just because someone is the daughter of an important person does not mean that they are not worthy.
• So this Scheck is an important person?
• A mighty poor turnout for such an important businessman.
• Such an important ensemble shouldn't leave the country.