I am trying to allow a user to select an object from a dropdown, and based on the chosen object, return a random number of records. The problem I'm having is that I am having trouble returning different types of object lists in the controller. What is the appropriate way to do this?

Controller

public with sharing class SearchObjectsToAudit {
    @AuraEnabled(Cacheable=true)
    public static Account[] searchAccounts(){
         return [SELECT Id, Name FROM Account ORDER BY Name LIMIT 50];
    }
    @AuraEnabled(Cacheable=true)
    public static Bear__c[] searchIntakes(){
         return [SELECT Id, Name FROM Intake ORDER BY Name LIMIT 50];
    }
    @AuraEnabled(Cacheable=true)
    public static Contact[] searchMatters(){
         return [SELECT Id, Name FROM Contact ORDER BY Name LIMIT 50];
    }
    @AuraEnabled(Cacheable=true)
    public static SearchObjects(String searchTerm) {
         System.debug(searchTerm);
         if (searchTerm == 'Account') {
            return searchAccounts();
        }

        else if (searchTerm == 'Intake') {
            return searchIntakes();
        }

        else if (searchTerm == 'Matters') {
            return searchMatters();
        }
        return null;
    }
}

HTML

<template>
    <lightning-combobox
        name="object"
        label="Object"
        value={searchTerm}
        placeholder="Select Object To Audit"
        options={options}
        onchange={handleChange} >
    </lightning-combobox>

    <lightning-card title="Bears" icon-name="utility:animal_and_nature">
			<div class="slds-card__body_inner">
				<!-- Start bear list -->
				<template if:true={bears.data}>
					<lightning-layout multiple-rows="true" pull-to-boundary="small">
						<template for:each={bears.data} for:item="bear">
							<lightning-layout-item key={bear.Id} size="3" class="slds-p-around_x-small">
                                    <p>{bear.Name}</p>
							</lightning-layout-item>
						</template>
					</lightning-layout>
					<!-- No bears found -->
					<template if:false={hasResults}>
						<div class="slds-align_absolute-center slds-m-vertical_small">
							This is beary disturbing, we did not find results...
						</div>
					</template>
				</template>
				<!-- End bear list -->
				<!-- Data failed to load -->
				<template if:true={bears.error}>
					<div class="slds-text-color_error">
						An error occurred while loading the bear list
					</div>
				</template>
			</div>
		</lightning-card>
</template>

JS File

import { LightningElement, track, wire} from 'lwc';
import SearchObjects from '@salesforce/apex/SearchObjectsToAudit.SearchObjects';
export default class ComboboxBasic extends LightningElement {
    @track value = 'Account';
    @track searchTerm = '';
	@wire(SearchObjects, {searchTerm: '$searchTerm'})
	bears;

    get options() {
        return [
            { label: 'Account', value: 'Account' },
            { label: 'Intake', value: 'Intake' },
            { label: 'Matter', value: 'Matter' },
        ];
    }

    handleChange(event) {
        window.clearTimeout(this.delayTimeout);
		const searchTerm = event.target.value;
		// eslint-disable-next-line @lwc/lwc/no-async-operation
		this.delayTimeout = setTimeout(() => {
			this.searchTerm = searchTerm;
		}, 300);

        this.value = event.detail.value;
    }
}