For me just from the picture, I would think possibly a angus bull like Net Worth or one of the Duff/OCC bulls may work well with her. To me she looks like she just needs softened up and made stouter. She looks like she is long fronted and spined. Looks like she may could use a higher milk epd bull also. A Simi bull like Grandmaster may work well also. I think that using a higher % Maine bull may not correct any of the things that she seems to possibly need. Remember that this is all from looking @ a picture and you know the cow better than I do. JMO