If you are "just getting back into photography" from a film background, you might find either 50/1.4 or 85/1.8 a good "starter" prime. With the crop conversion factor, a 50mm is no longer a "standard lens"... it's a short telephoto. A standard would be a 28/1.8, Sigma 30/1.4, or perhaps a 35/2.
But since you want to shoot portraits and appear to have a crop camera already, a short tele prime may be right up your alley. If that's the case, I'd recommend the 50/1.4. The 50/1.8 is a very lightly build, entry level lens with iffy autofocus... fine for occasional use, but might not survive a year of regular use.
The 50/1.4 can be useful indoors, when you don't have a lot of working room. The 85/1.8 might be too long at times. It's a nice lens, but both can give very nice image quality and blur down the background strongly. I recommend stopping the 50/1.4 to f2 or f2.2 for sharpest shots, though my copy is usable wide open. You might want to fine tune it with the Micro Adjust feature of the 70D, since focus accuracy is important when using large apertures in close, with very shallow depth of field. (Another reason to get the 50/1.4 over the 50/1.8... the 50/1.8 is nearly impossible to MA, since it's AF is so iffy.)
The 50/1.4 also falls nicely in between your 17-40 and the 70-200 you are planning to buy.
The 85/1.8 is very nice, too. It's got some chromatic aberration, but that's fixable in post processing. It would be more useful for indoor sports, tighter portraits or any situation where you have plenty of working space.
Regarding the 70-200... be sure to check it out in a store before buying. It's a great lens, but the f2.8 versions are pretty large and heavy. You might prefer the f4 IS.
70-200 really isn't long enough for wildlife photography, even on a crop camera. It's great for portraits (outdoors especially) and for sports. But if wildlife is a high priority, you might want to scale back some of your other purchases, to keep some budget aside for a longer lens such as the 300/4 IS (perhaps with a 1.4X teleconverter) or 400/5.6.