I would be tempted to try 3 centre backs, given the appalling full back options. The problem is that Dyche is so negative they could quickly become a back 5, with the wingbacks not crossing the half way line, and Dyche would insist on playing Michael Keane as one of the 3.Garner is plainly not a right back mate, he was absolutely terrible there yesterday.
Not sure why you think having a full back with a decent cross matters in a Dyche side either, since when are they ever far forward enough to get one in.
Simplest answer is you play Dixon (and actual right back) in the spot. OR you sod off fullbacks go to a 3-5-2 or variant thereof
With a new manager who might set us up to score from something other than a corner or a set piece, it would be a valid option.