That may not be a bad idea. However, due to the small amount of info many of them require, or even need if they are not signifigant, this may not be worth the time. If you had any proposed templates or such, I would be open to utilizing them if I see one fit for the job.
Well, basically, the most you could do through the wiki editing system would be to use one of the 5 headings. I believe headings 3-5 all do not have a large underline, so they can function as larger fonts if you wish. Otherwise, a trick I sometimes use is to cut the part you want with a bigger font out of the edit page, put it on, say, microsoft word, and change the font size there, then cut and paste it back.