I think you are more worried about the technique and process than the desired finished product. Start with what you want to end result to be then work backwards. And a big part of that is the kind of steak you are starting out with. I alter my technique to the steak, not the other way around. If I have a steak about the thickness of the ones you showed, no way I am trying a reverse sear. Just too thin. For those kind of steaks, I am doing a hot and fast sear. Crank your pit up as hot as you can get it and sear about 5 minutes per side more or less. I say that because I don't know how hot your grill can get. On my Rec Tec with grill grates, I get up to around 450 and for medium rare do about 5-5.5 minutes per side, turning halfway for cross-hatches. On my Primo, I am blasting around 650 and only need 3.5 to 4.5 minutes per side. But with a much thicker steak, that technique wouldn't work so well because I would end up with a thick band of well done meat and a thick band of rare in the middle. I reverse sear those.
My suggestion is to invest in some grill grates. practice both techniques of hot and fast and reverse sear. Plenty threads here to follow.