The courses you named are pretty easy because the combination of old outlines + E&E (esp. for Evidence, Tax and Admin - Corp is more subjective) make those classes a cakewalk.
Evidence wasn't bad and I haven't taken corps or tax yet but I have to disagree on Admin. That class can be unbearable at points and it's usually the most gunnerish class out there (besides fed courts).
I was told prior to law school to avoid Admin because it is both boring and gunner-y. I've taken the advice.
To OP: personally, I don't mind the foundational classes, and they tend to be pre-reqs for other stuff. At the very least, take Evidence and whatever the basic corporations class is. They tend to be helpful for other stuff.
I tend to agree with this. Evidence is crucial. I can see passing on corps if you don't want to do business law, but I still think you should probably take it to get a good grasp on stuff that comes up in a lot of different areas--particularly agency, vicarious liability, ways to limit personal liability, etc. Tax is probably not as critical as Evidence either, but the regular Federal Income Tax class will actually be somewhat useful to you in your own personal life--and this is probably the only law school class to which that statement would apply.