The word 'Hedonist' refers to -

Hedonist (noun): 
English Meaning - Someone who tries to have as much pleasure as possible, according to the belief that the most important thing in life is to enjoy yourself. 
Bangla Meaning - প্রেয়োবাদী।

Other options, 
Altruist - A person who cares about others and helps them despite not gaining anything by doing this. 
Pessimist - Emphasizing or thinking of the bad part of a situation rather than the good part, or the feeling that bad things are more likely to happen than good things. 
Pragmatist - Someone who deals with problems in a sensible way that suits the conditions that really exist, rather than following fixed theories, ideas, or rules. 

Source: Cambridge Dictionary.