Then, would the center feed be the best way to go?

For sure. I'd rather center feed, and have to use a
matching device, than use OCF, and not have to use
a matching device. The matching device can be as
simple as a series transformer made from 75 ohm, or
whatever coax. The feed of a 3/2 wave dipole is quite
close to that of a full wave loop. Usually higher than 50
ohms, if clear of the ground. The same series transformer
matching scheme will usually work for either one.
Say if you were on 21 mhz, and the SWR was a bit high.
Say 100 ohms feedpoint impedance, "more common with
antennas high off the ground", you could add 7.6 ft of 75
ohm coax, from the end of the normal 52 ohm feedline,
to the feedpoint of the antenna. That would give you a good
match. Might mess you up on 40m a bit though....I'm not sure
the exact effect it would have on the lower "1/2 wave" frequency.
Maybe not a whole lot...I guess you could switch it in and out
with a relay...BTW....Here, I don't have a very good match on
15 using my 40 dipole, but it's probably cuz I have 160/80/40
on one feedline...I just slap the tuner inline if I want to work 15..
I have used a series transformer on a 3/2 dipole on 20m....It
worked...It was one way I could run a EDZ type antenna, but
easily feed with coax. But...I used .75 wave per side, instead
of the .64 wave per side of the normal EDZ. That tunes out
the reactance, and all you need is the transformer. Sometimes,
you don't even need that as many 40/15 dipoles users know..
MK