Two excellent platinum plugs that will perform well in your '97 for 100k miles include the Autolite AP985 or Champion 3034. The iridium tipped Autolite XP985 is good for 200K miles and is a superb spark plug.
I'd stay with OE ignition wiring. Many aftermaket wiring sets (especially so-called "performance" or "low-resistance" sets) generate additional RF noise (like static) which can affect the engine computer or add static to the radio or CB if you have one. Not to mention most aftermarket wiring sets are poorly constructed and won't hold together when removed for maintenance... they often pull apart just during routine performance which, trust me, is beyond frustrating.
A good quality distributor cap & rotor will have brass contacts, cheapies will have aluminum.
I wouldn't bother with a hotter ignition coil, the OE ignition coil is actually very good and works as well as any of the aftermarket replacements like from Accel. Such aftermarket components can help older Jeep ignition systems but the TJ's ignition system is good enough that you won't see gains from replacing it with so-called performance parts. Really.