I would pick one movement and stick with it a while. Work on progressing on that lift and then after 4-8 (or whatever) weeks switch to another style. No one movement will give you a specific shape although people will argue it to death.

I would highly reccomend using your thumb wrapped around the bar (opposing) your fingers. This is much safer. If you look up bench press accidents on youtube many of them are due to having your thumb on the same side as your fingers and the bar falling out of the lifter's grip. Not good.

I would also say that trimming the fat a little more may also help your shape but it's hard to tell without a picture of the rest of you.

IW