Hi. I usually go for (low carb goes without saying) high fat and high protein foods but I try to eat them slowly, chew them well and be in the moment with them, so that I appreciate what I am having rather than just guzzling, which was my habit with comfort food before.
A cup of coffee or two with real double cream (not Elmlea) is a favourite.
Half a square of dark, min 70% cocoa chocolate with a spoon of crunchy peanut butter and the other half later... put the bar somewhere away from you so that you have to consciously get up and go back for seconds rather than have it to hand and get carried away.
Interestingly I find a crunchy texture is a big part of my comfort eating now.
A bag of nuts like brazils or walnuts.... you could always get a box of dark chocolate brazils and have those instead of choc with peanut butter as Brazils are much lower carb than peanuts.
A chunk of good quality cheese.... I now like the ones with intense flavour and that slight crystalline texture running through them.... Lidl do a Deluxe Vintage Somerset Cheddar which is really nice and has those slight crunchy crystals in it. Pork scratchings are my really guilty pleasure.... you can't get more crunchy than those!!
I also have veggie sticks with sour cream and chive dip.... the proper refrigerated kind not the Dorritto stuff in a jar which has all sorts of oils and additives.
Boiled eggs with a spoon or two of full fat mayonnaise.
Salami sticks.
Bacon butty made with low carb microwave bread (takes a few minutes to make) and I usually have it as a BLT with lettuce and tomato or mushrooms.
We have a few innovative bakers on the forum who make low carb cakes and cup cakes etc so if that is your thing then maybe
@NotWorriedAtAll can help you with her fantastic low carb baking recipes.
I confess that I also resort to a glass or two of alcohol if it is after 6pm and I feel it will help me chill. Again, making low carb choices is key, so spirits with low calorie mixers are fine and dry wine (red or white) but be aware that alcohol is empty calories, so don't overdo it, particularly if you need to lose weight.
I am sure that many of those things will not do it for you but hopefully it gives you some ideas.