Wood species for rod exposed to dry heat

Thank you for your time,
I have been asked to mill up what amounts to a few clothes rods for a family member. The rods will be about 5/8” by 1 3/8” by 7’ and suspended from the ceiling. This is no problem, but when he mentioned that it would be located just in front of his wood burning stove to dry clothes on, I got to thinking that I should think a little.

The actual application can be seen HERE

I have been given what is thought to be Ash for the project, but I am starting to think that I way not be able to get enough straight grained clear wood out of what I have, so I may be looking for different ideas anyway.

What domestic species do you all think would have the best chance at remaining straight, and holding the weight of several wet garments, in such a dry location.

Thank you all again for your time and advise!

Random background not overly pertinent to the question at hand:
A member of my family has just built a three story house that is only 24’x24’, it is more of a fire tower than a house really. With his new space restraints, he has started looking into storing more items in normally underutilized vertical space. Along with a lack of space, he has opted against grid power, partly by choice, and partly due to location. This has left him running everything off of solar power, and it seems that a clothes dryer is quit the juice hog. While visiting friends in the UK he came across the product in the link above, and hopes to use it to relieve the dryer of its duties.

-- Losing is the same as winning only backwards