I’ve decided to devote some of my portfolio to dividend stocks, can I please have a sanity check?

For a dividend section of my long-term portfolio, I've penciled in GAIN, MMM, PSEC, WPC and BHP with equal weighting. Room for risk because I'm just aiming to play with about 10% of the overall portfolio, maybe 20% if these picks turn out not to have been stupid. Horizon 30-35 yearsish. What do people think, are these reasonable choices? Tried to focus on aristocrats, but with a little diversification.