If the height of any of these will fit your restriction, then go by whichever coach you feel best meets you living needs...
If you find this is too close for comfort, well then one of the advantages of air suspension in most DP's - is the ability to lower the coach a inches. (Or raise it too.) These are usually needed less then a few times a year, but can make all of the difference in those times

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You seem to be gravitating towards Winnebago, but I was not clear on if you were looking new or 1-3 years old, or 3+ years old?
If you don't mind looking at other brands. Check out the Newmar Canyon Star models. The longer models are on the 26K chassis.
If you don't mind going older, National Dolphin had some well built Class A's on the Workhorse Chassis with the 8.1 and 6sp Allison's. Well thought of by those that own them. (They also had F53 Chassis available too - if Ford vs Chevy matters to you

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To be clear, sure not knocking the coaches you asked about - just don't know them as well, as when I looked at Winnebago's UFO models - the fit and finish of that era had me walking out of the dealer pretty quickly. But, different years can bring different 'attention to detail' by management

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Happy hunting,
Smitty