I don't know if you want another one with pasta but this is a favorite - and the recipe as is feeds about 10, so with your other salads you could up the servings.
BEAN AND PASTA SALAD
8 oz. uncooked rotini
1 can black beans
1 can great Northern beans
1 can kidney beans
1 11-oz. can whole kernel corn
1 2-oz. jar pimiento, chopped
1/2 cup mayonnaise
1/2 cup Zesty Italian dressing
1/2 tsp. ground red pepper
1/2 tsp. dry mustard
Cook and cool rotini. Mix all beans, corn and pimiento in bowl with juice from cans. While pasta is cooking and beans are soaking mix mayo, dressing, pepper, and mustard.
Pour bean mixture into colander, rinse and drain. Mix everything well and refrigerate for 2 hours.
MY NOTES: The mixture HAS to refrigerate for 2 hours to let the Italian dressing "calm" down. After 2 hours you can't taste it like you can at first. This is excellent with pulled pork. I have also added a can of garbanzo beans to stretch it a little. You can also add blackened or grilled chicken chunks to make it more of a main dish.
As far as a Mexican type salad you can always make a pico de gallo type thing and mix it with cold rice. Add some black beans or whatever beans you think would go with it.
You could also do the same thing with a basic bruschetta recipe (tomatoes, onion, basil, a bit of olive oil and balsamic) - toss with cold rice. Navy beans would be good with this.
I thought I had some recipes that would fit this bill but I don't. I know you didn't ask for this but this
is a favorite.
Panzanella would also be an option.
I think any of these mentioned could be mixed with rice for a different take on it.
Hope this stirs your imagination a little. If I come across anything else that might interest you I'll post it.