Golem seems good from the 3 coins your mention. They are still working and it would take them 2 to 3 years to deliver the final product. Another similar project is iEx.ec, they haven't started their ICO yet.: https://bitcointalk.org/index.php?topic=1746241.0

You could also look to invest into Dapps such as ICN, SNGLS, VSL ,EDG which are  good long term projects with a vision and a road map backed by good team members. I strongly believe that investing in such projects could create a lot of wealth for the holders.