You should not find the best but the ones that are very profitable. Because even if they are not the best and just an average but they are cheap and have low supply, you will still make the best profit multipliers and that's what important for investors.
Aside from that try search useful site for starting up your ico journey, it really help me a lot in choosing one for investment or joining bounty campaign and that's why I landed here in trade. And now I hope that the team will be still active to complete their roadmap as well as making this token a good one.