My vote is for the F-4 Phanthom II, any version. Big, brutal, unashamedly and purposefully UGLY. Hang tanks and ordnance on it and it only gets uglier.
For more than 20 years it made a living scaring the crap out of its adversaries.
And ... we need more planes like the Phanthom that perform the function of big, brutal and purposeful, whether they be ugly or beautiful.
LONG LIVE the RHINO!!!
Phil