The 30-year-old struggled last season but Foster feels the former Werder Bremen man is primed for a good campaign.
"We're so lucky, Markus has been fantastic," said the Albion goalkeeper.
"All he needed was a bit of a run because we get to see him in training every day and he's up there with the best finishers I've seen.
"He just puts the ball in the net. If he can transfer that on to a match day we've got an absolute world beater because he just has a knack of finding the corners.
"We've got a lot of options for the gaffer to mull over and decide what he's going to do."
For the big stories and the banter follow us on Twitter: @tribalfootball
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!