In my opinion one of the best sources to find out about new projects is the Service Announcements (Altcoins) board here on Bitcointalk. Almost every reliable project will create a announcement thread here and it's pretty easy to tell if people are really interested in the new projects or if it's only bots that are pushing the thread to the top.
That's how I recently found out about the Lattice exchange, a new interesting DEX, which is worth a closer look.
You should put this in your list too as the owner of icodrop is also very active investing in the legit icos too.
https://icodrops.com/
This most reliable site based on my experience.
I actually can not recommend icodrops, since they shared so many scams in the past. I honestly don't know how people can still trust this website.
That's correct also and do not promote or take those sites to other people if they trust they will scam, but it depends on their work and exploring the sites for every project they can see and to manage, better to make securing than join and join but its useless.