Seasoned investors understand the significance of blue-chip stocks in their portfolios. To maximize returns, a prudent strategy involves diversifying investments within a blue-chip portfolio. Amidst recent underperformance, select blue-chip stocks present attractive opportunities for investors seeking to capture superior returns over the next 36 months. Lockheed Martin (LMT), AT&T (T), and Pfizer (PFE) are compelling choices due to their strong fundamentals, compelling valuations, and growth catalysts.