You don't need to send them anywhere, just back to the same address as a single transaction.

Doing batches at a time, select up to 500 inputs from one address by drumming out a spacebar/down arrow combo down the list of inputs for a particular address, click send and do it to the address they come from, this will consolidate all inputs selected into a single one.

Once done for all the excess inputs, your wallet will perform much better and you can do housekeeping now and then by a simple send of an address balance back to itself without needing to manually select batches of inputs as long as there are less than 500 of them.

Pro-tip, wallet should be locked while you prepare the batch to send otherwise it might fail because some of the inputs are included in an amount that is staking.