exploiter:
(plural: ‘exploiters‘;the opposite word in meaning: the exploited; pronunciation: the letter ‘e’ rhymes with the letter ‘e’ in “pet” and the letter ‘x’ rhymes with the letter ‘k’ in “kick” — for the right pronunciation, please click here)
a person who uses another person’s innocent nature or helpless condition for his own benefit or purpose unfairly (exploits), especially acting to help others but actually helping his/herself;
a person who makes use of an opportunity/chance to make money in business or to make good progress in an activity;
a user,

an exploiter, making profits by exploiting others
Every worker thinks that his/her boss is an exploiter who makes him/her work more for less pay, and every boss believes that every worker is an exploiter who expects more pay for less work!
Some political exploiters exploit innocent voters by bribing them or promising them of free housing and free health, and after getting elected, they ignore the very people who voted for them.

a political exploiter exploiting the weak nations
A ‘manipulator’ is, apart from the less common meaning of ‘ a person who operates/works a machine, apparatus or device as a job’ also known as ‘operator’, a person who likes to take control of others’ lives, using bad methods or taking advantage of others’ innocence or ignorance and troubled situation they are in, and make them obey him/her for his/her own advantage.
For an article that describes a manipulator in this sense, please click here.

an exploiter/manipulator, taking advantage with double talk
The three types:
An exploiter, the worst of the three types, uses his/her power or influence to make others to do something that is not right to enjoy personal profit; a manipulator, takes advantage of the situation or creates a situation and plays psychological tactics (mind control) to keep others under his/her control to get what they want; and an ‘opportunist’, the least of these three types, is a person who does not do anything directly but waits patiently for a chance or for something, usually something bad or disturbing, to happen to others and then takes advantage of the situation to get what they want.
