Most Wall Street analysts see significant upside in Nvidia and Microsoft.Palantir Technologies has been one of the best-performing artificial intelligence (AI) stocks in recent years. Shares have advanced 1,000% since January 2024, but many analysts worry about its valuation. That may explain why Palantir did not appear on Morningstar's recent list detailing the best AI stocks to buy now.Instead, Nvidia (NVDA +1.02%) and Microsoft (MSFT 0.06%) took the top two spots, followed by Amazon, Broadcom, and Meta P ...