Is the transfer case in Neutral. If so, it will NOT move in ANY gear (I know DaKing, said so...just re-checking) Put the transfer case in 2wd.
The torque converter, if seated deep enough, should be about 1.5" inside the bell housing at the nose of the converter. The flexplate bolt "pads" stand the flexplate about 1/2" away from the torque converter.
If you had to pull the engine and tranny together with the mounting bolts, and not just slide it onto the locating dowels, it's likely seated correctly, There's not a lot of room for error in there. =BAD =GOOD
So, if you had to wrench on the tranny mounting bolts you'd be better off re-doing it. I (for a couple different reasons) had to stab my first tranny/converter/flexplate 3 times to get it right. (I fubbed up)
Also, if the torque converter is in deep enough you should not be able to stick your hand in behind the starter (with the starter out).
If you were to un-bolt the flexplate, you might be able to coax the torque converter back into place IF it's actually out of place. Lying under the Jeep with some good gloves on you just might be able to finesse it.
The torque converter will always turn with the engine running as it is bolted to the crankshaft. So looking to see if the flexplate/torque converter is turning will show you nothing.
To make dam sure the whole group is working you might want to unbolt the whole tranny again and re-do it...adding a new front seal for $8.99.
Just to be sure, flexplate bolted to crank, torque converter bolted to flexplate.