not in TE.
GK is a cosmetic part of the game.
It's expressing the "good or bad" luck, the roll dice of the game.
For example if you 're playing vs a much weaker team and the scenario is to win with 1-0 or get a draw or loose, the oppo GK will make 5 or more saves and will become the man of the match.
In next three games that GK maybe will get nothing and has a rate of 6.
At old times, before auto-subs, you could play with an injured GK and not conceded a goal.
You could use a DC as GK also and not conceded a goal if you are much stronger or that is the scenario (not to loose a match).
The only thing you can do is to have a GK with some high quality so to contributes to defense and general quality of the team and sometimes it's useful to have a special ability .

ST- if you 're playing with AML-AMC-AMR those are the scorers and the stars in TE.
ST is there just to keep busy oppo defenders. If a ST scores every second game, you must be pleased with him.
Great scorers ST are only when you set them for free-kicks and penalties.
If you 're playing with 2 or 3 STs (and no wingers), then maybe one of them will be good.