Sathya Sai Baba is a spiritual leader in India. He has several million followers, literally millions (~5 million). His last birthday they threw a party for him and a million people showed up. In any event, he performs miracles which can be attested to by thousands of people. We aren't talking about in a book that you get several generations later, we are talking about direct attributions of miracles similar to those attributed to Jesus, walking on water, healing the sick, raising the dead.
Now, a lot is made of the claims that if the Bible was a perfect representation of what was original written, that the work was not fiction, that there were contemporary figures to corroborate the existence of the figure, and that perhaps there were ways to verify these claims that then we would be correct to believe. I don't think that holds. For example, there is video of Sai Baba's miracles...
How can you be underwhelmed? What do you mean you saw him palm it the whole time? This is absolute proof, the kind many skeptics requested for the likes of Jesus. Why can you never be happy!