Which funds can replace WTSTX?

Which mutual funds can replace WTSTX?

Which mutual funds can replace WTSTX? ranked by return similarity
Rank	Ticker	Fund	Return similarity
1	FUAMX	Fidelity Intermediate Treasury Bond Index Fund	98.5%
2	FSIWX	Fidelity SAI Intermediate Treasury Bond Index Fund	98.2%
3	CPTNX	American Century Government Bond Fund Investor Class	97.6%
4	JHBMX	JHancockManaged Account Shares Bond Completion Portfolio	97.6%
5	TGCPX	TCW Core Fixed Income Fund Class Plan	97.5%
6	MWTNX	TCW MetWest Total Return Bond Fund Administrative Class	97.5%
7	TGLSX	TCW Securitized Bond Fund Class Plan	97.5%
8	VBIIX	Vanguard Intermediate-Term Bond Index Fund Investor Shares	97.5%
9	JIBFX	Johnson Institutional Core Bond Fund	97.4%
10	LIBAX	Columbia Total Return Bond Fund Class A	97.2%
11	SSASX	State Street Income Fund	97.2%
12	EINFX	Elfun Income Fund	97.2%
13	GHQPX	American Beacon Garcia Hamilton Quality Bond Fund Investor Class	97.1%
14	DFIGX	DFA Intermediate Government Fixed Income Portfolio Institutional Class	97.1%
15	SGVAX	Western Asset Mortgage Total Return Fund Class A	96.9%
16	AUGAX	Columbia Quality Income Fund Class A	96.9%
17	CMPGX	Principal Government & High Quality Bond Fund Class A	96.8%
18	MFAAX	American Funds Mortgage Fund® Class A	96.8%
19	MFGSX	MFS Government Securities Fund Class A	96.7%
20	RFDAX	Russell Investments Strategic Bond Fund Class A	96.7%