I'm generally in line here. Landscapes are preferably (to me) just that, LANDscapes.

I can only think of one exception, presently. My mother made a fantastic vertical composition of very tall standing pines in Beaver Creek SP in Ohio some years back. She included my brother in the photograph. Totally against all rules. The row was dead center, destroying the rule of thirds. And the was a man it it. But he is so small compared to the setting that he is a poigniant scale within the subject. Actually adds power to the shot.

So, in short, no. With exceptions, rare though they may be.