Easiest beginner fish?

i would say guppies, platies, swords, or danios. actually, i've had pretty good luck with my neons but i added them to a 55g established tank. i've lost one in the two months i've had them.
 
I have 4 neons and the oldest one is about 11 weels old.
 
erm well ive had a sissortail wiich has lasted me ages and is a very very hardy fish that shouldnt die that easly
 
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