OK lets go like this. First answer on your question. Scam word is used way to many on thsi forum. But yes most of this coins were a shortcut to a product. All ICOs are that. Instead of them to get an investor, they made ICO and gathered tons of BTC altho can be totally incapable delivering.
Now to list them frome more legitimate project to less legitimate it goes like this. Far ahead is
Monero. Because s something new and really good launched and developed.
Then
Litecoin was old school fairly launched, but development now is nothing big, and also did not go tat far from Bitcoin.
Aeon is like Monero Light, well tries to be. With way less development ofcourse. Was fairly lounched, but almost abandoned after a half year. Probably dont deserve rank.3 but no one got free AEONS or got paid to develop it.
After that are bunch of ICOs. ICO mean developers paid them self salary before they made a product. So sort of someone sold you a car before he made it. Like Elon Musk with Tesla he sold cars before he even build a factory. Good luck to him. But i will list them from how i think are more legit till less, but i dont know them that much to exactly know how much developers took, so take it with reserve and keep them as something similar:
Decred
Siacoin
zcash
Ethereum
Iconomi
Augur
Golem
Lisk
Komodo
Ripple is centralised and given for free to those that builds Ripple infrastructure.
This two are special case.
DASH look nice, but because of reduced emmision on second day, so much was mined on first day that with combination of PoS those guys totaly scamed since they did not just restart coin after 1 day. But now normaly works as a bitcoin clone. Altho made few people rich
Gulden is same case as DASH and was premiered and few people hold most. so yes could be said is a scam from this point.
Boolberry was nice coin similar as AEON or Monero but after half year abandoned and nooen develops it now. So is sort of waste of tiem to bother with it.
Pepecash same have no meaning. There is a game promised, but that is all.
Burst i dont really know what this is