I mainly use the 5D Mark 3 now, but I use a 7D rarely. 85 is good on a crop and FF, on a crop it gives the field of view of a 135 and on FF its an 85 both are good focal lengths for portraits..The 100mm is mor like a 160 on a crop, the 100mm is good if you are on FF for portraits. look into the 135L tho it is supposed to be one of the best lens for portraits(once you get to FF), and yes the 70-200 f2.8 is mk 2 is one of the best lenses you can buy but at $2,500 it better be up there lol(it has the IQ of a prime while being a zoom). I would hop on the 24-105L if you can get it for $350 at the very least if you dont like it then you can sell it for at least $500 and make a few dollars on CL.
But ive have the 18-55, 75-300,55-250, and the 18-200 and the 24-105L gave me instant gratification as soon as I used it. Images just look better than the rest. even tho the 24-105 isnt the greatest L lens it is better than what you have 9/10 unless you are working with some primes. Also the 24-205 is weather sealed, and has a constant f4 aperture so you dont have to worry about it changing as you zoom in.
And you sound like you got a camera hook up, send me an 85 1.8 bruh bruh