You can use https://www.coinist.io/roi/?sortby=roi_ico_percent&order=desc
They update it quite frequently and you can filter for different timeframes. Icostats is outdated.
Another great resource:
The best icos based on more than 20 reviewers are on this summary sheet: https://docs.google.com/spreadsheets/d/1Ja83ZCDDOgNXNYatD5w-2grA8IENuSwGjtSHWOG247E