Your narrow stance is very good unless your feet are locked together. Walking width is the correct stance width--that's how your body has been balancing itself since you were a year old. You absolutely need to lighten the inside ski by pulling that knee up. The more weight you have on the outside ski, the more it bends and the better it turns you.
Are you back on your heels in some of these shots? Ski on the balls of your feet all the time. Hinge forward at the ankles to get your body's center of mass (somewhere in your torso) forward over your skis' sweet spots.
--Double pole drag where you drag both poles pressed hard down into the snow. If you outside pole tip comes up in the air, you know you aren't angulating. Do the double pole drag all the way down a run. No cheating, keep that outside pole tip dragging hard in the snow all the time.
--Double pole drag with counter. As you drag both poles hard into the snow, rotate your body--from the hips upward--toward the outside of the turn. Your arms follow with your body, not lead it. You will start with your poles equally out to the sides and end up with the inside pole tip up near the tip of your inside ski and the outside pole tip downhill from your outside heel. The more counter the better. The earlier you get fully countered, the better. Conventional wisdom is to "ski into counter," but there is no biomechanical reason to wait for this.
--Tilt your pelvis and shoulders higher on the inside of the turn. Left turn, lift the left side of your pelvis as much as you can; lift the right side for right turns.
--Don't allow the inside pole to drag on the snow. Lift the inside pelvis, shoulder, arm to keep the pole out of the snow.
--Poles across the kneecaps. Feel that hollow at the top of your kneecaps? Hold your poles across your knees with them settled into those hollows. Ski keeping the poles in those hollows. Don't let the poles get pulled up on the outside leg.
--Turn with the tail (only the tail) of the inside ski lifted a small bit off the snow. Lifting the whole ski off the snow throws many into the back seat. Keep the lifted ski pulled strongly back as mentioned above.
--Medium firm grip on the pole, reach way downhill, down the fall line from your outside heel. This pulls your body into a good position.
--Do not push your inside foot forward as you counter. Pull it back strongly all the time through every turn. The sharper and steep the turn, the stronger it needs to be pulled back.
Photo #2...too square to your skis. You should be facing the camera from the hips up. Hands should not be palms inward. Left side from foot, hip, shoulder, hand should be higher and more forward (not the foot, the rest of the body). Right side should be back and the right hand reaching the pole down the hill.
Photo #4...picture yourself with your feet where they are, your hips & torso turned to the left, pelvis & shoulders tilted higher on their right sides, right arm & pole forward with the tip up near your ski tip, left arm & pole reaching down the fall line from your heel ready for the next pole tap. The pole tap should not involve an arm swing. Just a twitch of the wrist to tap the point on the snow, 'cuz it's already in position.
Marcel Hirscher. His skis are aimed to our left, and his hips & shoulders are aimed to our right. His right hand is low, but at these angles can't get any higher. Narrow stance, right boot next to left knee, max vertical separation of the feet. His angulation is shown in the difference between the angle of his left leg and of his spine. Most of us only dream of skiing like this, but we can use the same fundamentals every turn.