Western Basin launch ramps
There are several sites that list launch ramps in the western basin of Lake Erie. This site (walleye.com) has a list of marinas on the home page, left column, down at the bottom, ""Marinas and Dockage." Some of these marinas have a public launch ramp. Do an internet search with "Lake Erie western basin launch ramps" and see what you find. Some have photos. Here's just one - www (dot) lakeerieactivities (dot) com - it has a launch ramps page with photos and location / info.
When it's rough it is rough
It is pretty difficult to avoid rough conditions on Erie when the wind is up. In my experience, the conditions coming out of Wild Wings and the conditions coming out of Mazurik on the same day are going to be roughly the same (no pun intended). There may be a few exceptions to this, but if the intent is on fishing, you won't be going where you will want to go to catch 'em.
In the summertime, you can choose to make the rough ride out from one of the Catawba or Marblehead launches and then hide behind the islands for some Walleye or Perch fishing, but I am not sure how the the fishing is this far out during the spawn as I stay in close.
Just my .02 and someone may have had different experiences than I have.