Anyone like the apurure style
Check on the adjustment range for the trim and wattage limit with the combination. You may be limited to 35-watts. To dramatize and call attention to something accent lighting needs to boost the lumens on the subject well above the surroundings to bring your eye to it. You may need to dim the center fixture to help compensate so that the art stands out if I understand the look you want of spotted paintings glowing more intensly than the surroundings rather than the general wash of light you have now.
Different brands and styles of trims have different ranges of adjustments. Normally the slot aperture has the largest of the adjustment ranges and may go to 40 or 45 degrees without blocking the lamp so this should be a good choice. Other trims claim 35 or more degrees but may partially block the lamp.