Depending on your tolerance of wheat and sugar, most homemade bread is pretty healthy so long as you're mindful of portions! I don't have a breadmaker but my husband and I bake bread once a week and 1 loaf lasts us the entire week. 1 slice here, 1 slice there...
I have no idea how it would work in a breadmaker but there are quite a few recipes out there for super long rise breads that don't use sugar to feed the yeast. There's sugar in flour already and if you leave it long enough the yeast will eat that to grow. It's actually much more flavourful! I'd stay away from foccacia bread as it requires loads of olive oil (if made properly) so it'll up your calories per slice (that being said, I will still make it and enjoy it but less often than french bread or ciabatta).
Experiment and have fun! I'm sure whatever you make will taste wonderful. Just be mindful of portions!
