i would get a lesson

Are you doing it for all of your irons or just certain ones?

If its your long irons, 4 and 5, then spend some time working on those specifically at the range. If it's all of them then absolutely look at lessons

It’s inconsistent on every club. I am a self taught golfer but I struggle on consistency a lot.

Serious answer: as fellow TT members have suggested, consult a competent PGA professional for swing advice. Short of that, maybe someone who knows the golf swing could help. Remember that 'free advice' is worth exactly what you paid for it, though.

Humerous answer: Golfer dashes off to see his doctor, an orthopedist. "Doctor, doctor, I need surgery immediately!" "Why, what happened? What is wrong?" "I need you to shorten my legs by an inch and a half!!" "That sounds pretty serious? Why do you want that kind of surgery?" "It's because I keep topping all my golf shots!"

Right you are Tom. See a professional or at least someone who knows the golf swing

My wife was having that problem, she was rising up through her swing so I'd say try to stay down, keep your head in relatively the same position from backswing through impact and don't try to look at the ball after you hit it

Got to love Thomas’s answer. If you need help with the swing go see a PGA professional. They are in the best position to help..

Will custom fitted clubs make a difference? I’m 6’4 and so far I’ve only gotten extensions but never a real fitting.

Yes. Go to a fitting. Height is only one consideration. Just because you're tall doesn't mean you need longer clubs. I'm a bit tall so the fitter had me try 1/2" longer, but with long arms we went with standard length and 2 degrees flat. The bonus is I don't have to bend over as much to pick up my ball.

I would try a drill where you keep your shoulders on plan until impact. I’m a swing coach and most of my students have a tendency to raise there trail shoulder or drop it.

If you have the extra bucks a couple few lessons from a pro could definitely help you out. If you’re looking to figure it out yourself there are tons of great YouTube videos on proper iron striking. Also take your cell phone and record your swing straight on and in line, compare your swing at different moments to some of the pros you follow, and compare what’s different. For sure, getting solid compression with irons is key. Topping irons could be caused by multiple different things but you won’t hit a solid iron shot without good compression at impact

Shawn Clement Wisdom in Golf YouTube.