Which is the best mutual fund for long-term — Parag Parikh Flexi Cap, Motilal Oswal Midcap, or others?

Hi everyone, planning to start investing in mutual funds for long-term wealth creation (7+ years). Details: • Investment mode: Monthly SIP • Risk tolerance: Moderate to high • Goal: Long-term capital growth • No existing mutual fund portfolio I’m currently considering: • Parag Parikh Flexi Cap Fund • Motilal Oswal Midcap Fund I’m confused between flexi-cap vs midcap vs index funds. Which category would be better for long-term consistency? Is it better to choose just one fund or combine categories? Are there any better alternatives I should research? I’m open to learning and would really appreciate guidance. Thanks!