What type of high blood pressure medication would be best to combine with beta blocker?

Just about any: We often combine beta blockers w/mild diuretics, ace inhibitors, arb, ccb, etc. Many patients need 3 or more BP lowering medications to achieve their goal bp. It's just a matter of choosing a drug from each class, looking for secondary gain if possible, while avoiding side effects. Diuretics are good if you have swollen feet. Ace inhibitors & arbs protect heart in CHF & kidneys in diabetcs.