My go-to probios are NOW 8 Billion Acidophilus & Bifidus, GOL's Primal Defense Ultra, and Jarrow EPS. Sometimes I get Thorne B. Coagulans or Kyodophilus 9 or a liquid probiotic called Living Streams (L. Paracasei) to switch it up. Othertimes I get the Attune candy bars for the Howaru strains or the Good Belly drinks for the L. Plantarum sparingly.
Basically, I subscribe to the notion that switching combinations of these act locally on pathogenic bacteria and crowd them out, or at least keep them guessing so they don't become probiotic-resistant, if I may use such a term, to one specific strain/combo of probiotics. This may not work for all and that may depend on the individual fecal microbiota profile we uniquelly each harbor, or the specific segments of digestive tract affected we each must determine (scopes/pill cams). Similarly, I think this accounts for individual food sensitivities which should be self monitored. Just my thoughts, think for yourself.
In addition to the above, I also believe taking something like Sonne's #7 (calcium bentonite clay) for a day or two per month helps adsorb and sweep away pathogenic populations. Lately, I've been taking Zeoforce zeolites for the same purpose, just one cap a day in the morning on empty stomach followed by a couple glasses of water before eating a couple hours later. This stuff has almost eliminated my dependence on probiotics, for the purpose of being tolerant of foods and keeping my BMs in one piece, but I still take one a day for the cognitive/immuno benefits.
For about 8 years now I haven't had meds, except LDN for the past couple years as a preventative/maintenance supplement. About 3 grams of actual omega 3s, enterically delivered daily act as anti-inflammatory. Mind you I don't go for milk, except cheese and occasional yogurt/kefir, and I don't eat HFCS/fake sugars and limit refined grains and cane sugar. No GMOs, preservatives, food like ingredients or dyes--real whole food ingredients only. I drink lots, about a gallon, of clean filtered water daily also.