The last one is better. In Lightroom, I think the best instruction I can give is to go from top to bottom in the Develop palette. Start with exposure fix and work your way down.
Most blacks should have some detail, like hair. Also whites, except specular highlights. In Photoshop levels, for commercial print work, in Levels (histogram work), I always defined my cmyk black point as 0,0,0,95% black; white point as 5%,0,0,0. Then I'd pick the area in the image that I wanted black WITH detail, and then using the white picker to choose the area I wanted white with detail. That, and 20 years of darkroom work, taught me how an image should look. In your first image with the guy leaning dow, that black point might be some in the black mess of the womans and kids hair -- now a blob (a little trial and re-try works to find it), and the white point might be the littlest girls smooth area of her dress.
I just noticed a weird edge to the guys shirt at the sky. You got some mask going on here?
Unless you wanted a blind "OOH OOH, what great photos" and "how did you get these amazing images?