I wouldn't like your suggested sandwiches, sorry. My favourites would be cheese and pickle, cheese and celery, ham and tomato, plain chicken and coronation chicken with iceberg lettuce. No mayo on any of them. Plain cheese, plain ham or corned beef and pickle would be acceptable, as would cheese and tomato or marmite and cucumber. I could probably manage cream cheese and celery or tomato, chicken and bacon with minimal mayo, chicken and sweetcorn.
I can't stand mustard or horseradish, I don't like 'leaves ' unless it is proper lettuce (preferably iceberg but also sweet gem, little gem, cos or romaine) I don't like mayo. I can't stand chilli in any form. I don't like mushy veg (roasted peppers etc.) in a sandwich. I know - I am fussy. I dread going to a catered event and all the sandwiches have been over-fancified so are inedible for me.
I also like my own version of a tuna filling. Tinned tuna, finely chopped red pepper, finely chopped spring onion, blob of tomato sauce, dash of oregano, mixed well. Best not prepared too far in advance, or if it is, then sandwiched between lettuce leaves, as it can make the sandwich a bit soggy.
My favourite sandwich is really good brown bread, butter, sliced roast turkey, (proper roast turkey, not out of a packet) iceberg lettuce, pickle and cranberry sauce. Can also be made with chicken, and can include sausage and/or chestnut stuffing if those happen to be left over.