I also agree with the JA's post.
Orange peel will possibly add some bitterness, which you eventually get from hops and from the roasted malts. That being said, you could drop it or try to re-balance the beer, in the way JA tried to advise above.
Coffee beans are nice, but using (enough ) the right roasted malts, will get you strong coffee aromas and flavours, without the need for the actual coffee beans.
Cocoa beans - I tried it - they are nice. Soak them for a few days in some vodka, whiskey, rum, etc. and then dump the whole thing in the fermenter. However, cocoa beans can add astringency, so make sure not to use too much of it. Crush the beans before for a better effect.
Personally, I like cocoa beans and lots of vanilla in my Stouts and some porters.