like the look of the ham/eggs/peas bit as a nice qucik evening meal but would like something better then the wings to go with it
The 'al ajillo' part refers to the frying of the meat in garlic and spices, so you
could replace the chicken wings with another similar meat and, providing you kept the cooking method the same, not ruin the balance of flavours in the dish.
Fish and seafood are a staple of the Andalusian diet, which is where the dishes are drawing inspiration from, but I would question their suitability with the serrano ham and peas.
Ideally you want something 'picky' that you can eat with your fingers, which is why the tips are ideal. Chicken thighs or drumsticks would be fine, as would be poussin, rabbit, etc.
Whatever you choose, it really has to be fried in garlic and paprika to work with the peas and jamón.
That recipe looks like a confused dish to me: fried chicken wings and a pig, pea & egg dish - seem like two separate things.
They are two classic Andalusian tapas dishes, so I'm afraid the confusion is on your part, not the food's.
I would just bulk up the braised pea part of the dish. Skip the Serrano ham (or include it if you want) and get some cubed gammon into it to bulk up with meat.
There's really no need whatsoever to 'bulk up' the pea dish by omitting the star ingredient or adding some rather inferior gammon.
It's a fantastic pairing of two classic dishes, so if you're going to do it, do it properly - don't ruin the bloody thing by messing around with the balance of flavours and throwing in things that don't belong.